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Keisuke Ejima

Assistant Research Scientist

Education

Affiliations

Projects

Papers

Ejima K, Kim KS, Iwanami S, Fujita Y, Li M, Zoh RS, Aihara K, Miyazaki T, Wakita T, Iwami S. (2021). Time variation in the probability of failing to detect a case of polymerase chain reaction testing for SARS-CoV-2 as estimated from a viral dynamics model. Journal of the Royal Society, Interface, 18(177)

Iwanami S, Ejima K, Kim KS, Noshita K, Fujita Y, Miyazaki T, Kohno S, Miyazaki Y, Morimoto S, Nakaoka S, Koizumi Y, Asai Y, Aihara K, Watashi K, Thompson RN, Shibuya K, Fujiu K, Perelson AS, Iwami S, Wakita T. (2021). Detection of significant antiviral drug effects on COVID-19 with reasonable sample sizes in randomized controlled trials: A modeling study. PLoS medicine, 18(7)

Kroeger CM, Ejima K, Hannon BA, Halliday TM, McComb B, Teran-Garcia M, Dawson JA, King DB, Brown AW, Allison DB. (2021). Persistent confusion in nutrition and obesity research about the validity of classic nonparametric tests in the presence of heteroscedasticity: evidence of the problem and valid alternatives. The American journal of clinical nutrition

Kim KS, Ejima K, Iwanami S, Fujita Y, Ohashi H, Koizumi Y, Asai Y, Nakaoka S, Watashi K, Aihara K, Thompson RN, Ke R, Perelson AS, Iwami S. (2021). A quantitative model used to compare within-host SARS-CoV-2, MERS-CoV, and SARS-CoV dynamics provides insights into the pathogenesis and treatment of SARS-CoV-2. PLoS biology, 19(3)

Jeong YD, Ejima K, Kim KS, Iwanami S, Bento AI, Fujita Y, Jung IH, Aihara K, Watashi K, Miyazaki T, Wakita T, Iwami S, Ajelli M. (2021). Revisiting the guidelines for ending isolation for COVID-19 patients. eLife, (10)

Ohashi H, Watashi K, Saso W, Shionoya K, Iwanami S, Hirokawa T, Shirai T, Kanaya S, Ito Y, Kim KS, Nomura T, Suzuki T, Nishioka K, Ando S, Ejima K, Koizumi Y, Tanaka T, Aoki S, Kuramochi K, Suzuki T, Hashiguchi T, Maenaka K, Matano T, Muramatsu M, Saijo M, Aihara K, Iwami S, Takeda M, McKeating JA, Wakita T. (2021). Potential anti-COVID-19 agents, Cepharanthine and Nelfinavir, and their usage for combination treatment. iScience

Ejima K, Koizumi Y, Yamamoto N, Rosenberg M, Ludema C, Bento AI, Yoneoka D, Ichikawa S, Mizushima D, Iwami S. (2021). HIV testing by public health centers and municipalities and new HIV cases during the COVID-19 pandemic in Japan. Journal of acquired immune deficiency syndromes (1999)

Ejima K, Kim KS, Ludema C, Bento AI, Iwanami S, Fujita Y, Ohashi H, Koizumi Y, Watashi K, Aihara K, Nishiura H, Iwami S. (2021). Estimation of the incubation period of COVID-19 using viral load data. Epidemics, (35)

Yoneoka D, Shi S, Nomura S, Tanoue Y, Kawashima T, Eguchi A, Matsuura K, Makiyama K, Uryu S, Ejima K, Sakamoto H, Taniguchi T, Kunishima H, Gilmour S, Nishiura H, Miyata H. (2021). Assessing the regional impact of Japan's COVID-19 state of emergency declaration: a population-level observational study using social networking services. BMJ open, 11(2)

Kim KS, Iwanami S, Oda T, Fujita Y, Kuba K, Miyazaki T, Ejima K, Iwami S. (2021). Incomplete antiviral treatment may induce longer durations of viral shedding during SARS-CoV-2 infection. Life science alliance, 4(10)

Nomura S, Yoneoka D, Shi S, Tanoue Y, Kawashima T, Eguchi A, Matsuura K, Makiyama K, Ejima K, Taniguchi T, Sakamoto H, Kunishima H, Gilmour S, Nishiura H, Miyata H. (2020). An assessment of self-reported COVID-19 related symptoms of 227,898 users of a social networking service in Japan: Has the regional risk changed after the declaration of the state of emergency?. The Lancet regional health. Western Pacific, (1)

Yoneoka D, Tanoue Y, Kawashima T, Nomura S, Shi S, Eguchi A, Ejima K, Taniguchi T, Sakamoto H, Kunishima H, Gilmour S, Nishiura H, Miyata H. (2020). Large-scale epidemiological monitoring of the COVID-19 epidemic in Tokyo. The Lancet regional health. Western Pacific, (3)

Ejima K, Brown AW, Smith DL Jr., Beyaztas U, Allison DB. (2020). Murine genetic models of obesity: type I error rates and the power of commonly used analyses as assessed by plasmode-based simulation. International journal of obesity (2005), 44(6)

Huibregtse ME, Nowak MK, Kim JE, Kalbfell RM, Koppineni A, Ejima K, Kawata K. (2020). Does acute soccer heading cause an increase in plasma S100B? A randomized controlled trial. PloS one, 15(10)

Nowak MK, Bevilacqua ZW, Ejima K, Huibregtse ME, Chen Z, Mickleborough TD, Newman SD, Kawata K. (2020). Neuro-Ophthalmologic Response to Repetitive Subconcussive Head Impacts: A Randomized Clinical Trial. JAMA ophthalmology, 138(4)

Ejima K, Xavier NA, Mehta T. (2020). Comparing the Ability of Two Comprehensive Clinical Staging Systems to Predict Mortality: EOSS and CMDS. Obesity (Silver Spring, Md.), 28(2)

Tahir MJ, Ejima K, Li P, Demerath EW, Allison DB, Fields DA. (2020). Associations of breastfeeding or formula feeding with infant anthropometry and body composition at 6 months. Maternal & child nutrition

Yoneoka D, Kawashima T, Tanoue Y, Nomura S, Ejima K, Shi S, Eguchi A, Taniguchi T, Sakamoto H, Kunishima H, Gilmour S, Nishiura H, Miyata H. (2020). Early SNS-Based Monitoring System for the COVID-19 Outbreak in Japan: A Population-Level Observational Study. Journal of epidemiology, 30(8)

Gonzalez-Nieto L, Castro IM, Bischof GF, Shin YC, Ricciardi MJ, Bailey VK, Dang CM, Pedreño-Lopez N, Magnani DM, Ejima K, Allison DB, Gil HM, Evans DT, Rakasz EG, Lifson JD, Desrosiers RC, Martins MA. (2019). Vaccine protection against rectal acquisition of SIVmac239 in rhesus macaques. PLoS pathogens, 15(9)

Ejima K, Dickinson SL, Brown AW, Yanovski JA, Kaiser KA, Hall KD, Heymsfield SB, Allison DB. (2019). Exceptional Reported Effects and Data Anomalies Merit Explanation from "A randomized controlled trial of coordination exercise on cognitive function in obese adolescents" by. Psychology of sport and exercise, (46)

Huibregtse ME, Zonner SW, Ejima K, Bevilacqua ZW, Newman SD, Macy JT, Kawata K. (2019). Association between Muscle Damage and Head Impacts in High School American Football. International journal of sports medicine, 41(1)

Ejima K, Brown AW, Schoeller DA, Heymsfield SB, Nelson EJ, Allison DB. (2019). Does exclusion of extreme reporters of energy intake (the "Goldberg cutoffs") reliably reduce or eliminate bias in nutrition studies? Analysis with illustrative associations of energy intake with health outcomes. The American journal of clinical nutrition, 110(5)

Vorland CJ, Brown AW, Ejima K, Mayo-Wilson E, Valdez D, Allison DB. (2020). Toward fulfilling the aspirational goal of science as self-correcting: A call for editorial courage and diligence for error correction. European journal of clinical investigation, 50(2)

Yamamoto N, Ejima K, Nishiura H. (2018). Modelling the impact of correlations between condom use and sexual contact pattern on the dynamics of sexually transmitted infections. Theoretical biology & medical modelling, 15(1)

Saito MM, Ejima K, Kinoshita R, Nishiura H. (2018). Assessing the Effectiveness and Cost-Benefit of Test-and-Vaccinate Policy for Supplementary Vaccination against Rubella with Limited Doses. International journal of environmental research and public health, 15(4)

Ito Y, Tauzin A, Remion A, Ejima K, Mammano F, Iwami S. (2018). Dynamics of HIV-1 coinfection in different susceptible target cell populations during cell-free infection. Journal of theoretical biology, (455)

Ejima K, Nishiura H. (2018). Real-time quantification of the next-generation matrix and age-dependent forecasting of pandemic influenza H1N1 2009 in Japan. Annals of epidemiology, 28(5)

Martins MA, Tully DC, Pedreño-Lopez N, von Bredow B, Pauthner MG, Shin YC, Yuan M, Lima NS, Bean DJ, Gonzalez-Nieto L, Domingues A, Gutman MJ, Maxwell HS, Magnani DM, Ricciardi MJ, Bailey VK, Altman JD, Burton DR, Ejima K, Allison DB, Evans DT, Rakasz EG, Parks CL, Bonaldo MC, Capuano S 3rd., Lifson JD, Desrosiers RC, Allen TM, Watkins DI. (2018). Manifest Early Control of SIVmac239 Replication. Journal of virology, 92(16)

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