Indeks Artikel Jurnal-Majalah AJE Vol.177 Internal validation of risk models in clustered data: a comparison of bootstrap schemes Bouwmeester, W. Moons, K.G.M. Kappen, T.H. Klei, W.A. van Twisk, J.W.R. Eijkemans, M.J.C. Vergouwe, Y. bootstrapping clustered data internal validation model performance multilevel analysis risk models Oxford University Press 2013 https://lib.fkm.ui.ac.id:443/detail?id=102097