Arana A, Castellsague J, Tognoni G, Perez-Gutthann S. Individual daily questionnaires in pharmacoepidemiologic studies and ways of analyzing recurrent events. Comparing tolerability of Desferal® in a real-life setting. Presented at the 13th International Conference on Pharmacoepidemiology; 1997. Orlando, FL. [abstract] Pharmacoepidemiol Drug Saf. 1997 Aug; 6(S2).