PLOD1 and Azoospermia: Overview about results obtained from individual patients with permanent azoospermia including reproductive history of successful mating (yes/no), months since last successful mating (last mating), activity of alkaline phosphatase (AlP) [IU/l], result of aerobic bacterial culture and results of endocrine analysis: concentrations of luteinizing hormone (LH) [ng/ml], testosterone (T) [nmol/L], estradiol-17ß (E2ß) [pmol/L], thyroxine (T4) [μg/dl], canine thyroid-stimulating hormone (cTSH) [ng/ml], thyroglobulin autoantibodies (TgAA) [%].