Chronic administration of melatonin induces changes in porphyrins and in the histology of male and female hamster Harderian gland: Interrelation with the gonadal status

1. Rodriguez‐Colunga, M.J.
2. Fernandez, C.
3. Antolin, I.
4. Rodriguez, C.
5. Tolivia, D.
6. Menendez‐Pelaez, A.