Percentage of CD4 cells undergoing apoptosis before and after 15, 30, 90, and 150 days of L-carnitine treatment (each patient is indicated by a code). The apoptotic CD4 cells were analyzed by flow cytometry after 7-AAD as described in Materials and Methods. (▪) 2000; (⧫) 5419; (▴) 5716; (▴) 5762; (▾) 6438; (⧫) 6457; (★) 6464; (▪) 6466; (•) 6655; (▴) 6684; (▾) 7173.