title: The challenges of serial time dependent data?
authors: Mark
authors: M
authors: Sigman
authors: Jon
authors: J
authors: Pryor
mesh_terms: D002331:Carnitine / Q000494:pharmacology*; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D013076:Sperm Count / Q000706:statistics & numerical data; D013081:Sperm Motility / Q000187:drug effects* / Q000502:physiology; D013997:Time Factors
chemical_list: D002331:Carnitine