TY  - GEN
AU  - Morales Martínez,M E
AU  - Pedrón,N
TI  - [beta-Endorphins and the male reproductive system]
SN  - 0300-9041
PY  - 1999///0622
KW  - Humans
KW  - Male
KW  - Narcotics
KW  - analysis
KW  - Peptides
KW  - Semen
KW  - chemistry
KW  - beta-Endorphin
N1  - Publication Type: English Abstract; Journal Article; Review
ER  -