Comment on

• A placebo-controlled double-blind randomized trial of the use of combined l-carnitine and l-acetyl-carnitine treatment in men with asthenozoospermia.

  Lenzi A, Sgrò P, Salacone P, Paoli D, Gilio B, Lombardo F, Santulli M, Agarwal A, Gandini L. Lenzi A, et al. Fertil Steril. 2004 Jun;81(6):1578-84. doi: 10.1016/j.fertnstert.2003.10.034. Fertil Steril. 2004. PMID: 15193480 Clinical Trial.
• The challenges of serial time dependent data?

  Sigman M, Pryor J. Sigman M, et al. Fertil Steril. 2005 Jul;84(1):264-5; author reply 265-6. doi: 10.1016/j.fertnstert.2005.04.003. Fertil Steril. 2005. PMID: 16009205 No abstract available.