Oral administration of tetrahydrobiopterin attenuates testicular damage by reducing nitric oxide synthase activity in a cryptorchid mouse model.
Kondo Y, Ishikawa T, Yamaguchi K, Yada T, Fujisawa M. Oral administration of tetrahydrobiopterin attenuates testicular damage by reducing nitric oxide synthase activity in a cryptorchid mouse model. J Androl. 2008 Mar-Apr; 29(2):153-63.