See the following publication:
Gesualdo, L., London, G., Turner, M., Lee, C., MacDonald, K., Covic, A., Zaoui, P., Combe, C., Dellana, F., Muenzberg, M., \& Abraham, I. (in press). A pharmacoepidemiological study of the multi-level determinants, predictors, and clinical outcomes of biosimilar epoetin alfa for renal anemia in hemodialysis patients: background and methodology of the MONITOR-CKD5 study. Internal and Emergency Medicine. (DOI 10.1007/511739-011-0622-7)