Descriptions and reporting of adverse events in clinical trials with no control group.

Abbreviations: ¥ = both follow-up duration and frequency defined a priori for adverse event, + = adverse event not defined a priori, * = clinical endpoint defined a priori, ++ = only follow-up duration listed for all events a priori, follow-up frequency not listed, AE = adverse event, DMSO = dimethylsulfoxide, FBS = fetal bovine serum, GVHD = graft-versus-host disease.