BMC Medical Research Methodology Williams, R D, Markus, A F, Yang, C, Duarte-Salles, T, DuVall, S L, Falconer, T, Jonnagaddala, J, Kim, C, Rho, Y, Williams, A E, Machado, A A, An, M H, Aragón, M, Areia, C, Burn, E, Choi, Y H, Drakos, I, Abrahão, M T F, Fernández-Bertolín, S, Hripcsak, G, Kaas-Hansen, B S, Kandukuri, P L, Kors, J A, Kostka, K, Liaw, S-T, Lynch, K E, Machnicki, G, Matheny, M E, Morales, D, Nyberg, F, Park, R W, Prats-Uribe, A, Pratt, N, Rao, G, Reich, C G, Rivera, M, Seinen, T, Shoaibi, A, Spotnitz, M E, Steyerberg, E W, Suchard, M A, You, S C, Zhang, L, Zhou, L, Ryan, P B, Prieto-Alhambra, D, Reps, J M & Rijnbeek, P R 2022, ' Seek COVER : using a disease proxy to rapidly develop and validate a personalized risk calculator for COVID-19 outcomes in an international network ', BMC Medical Research Methodology, vol. 22, 35 . https://doi.org/10.1186/s12874-022-01505-z BMC Medical Research Methodology, 22(1):35. BioMed Central Ltd. BMC Medical Research Methodology, 22(1). BMC BMC Medical Research Methodology, Vol 22, Iss 1, Pp 1-13 (2022)