title: Relationship between nocturnal plasma oestrogen concentration and free plasma tryptophan in perimenopausal women.
mesh_terms: D002940:Circadian Rhythm; D004967:Estrogens / Q000097:blood*; D005260:Female; D006801:Humans; D008593:Menopause; D014364:Tryptophan / Q000097:blood*
chemical_list: D004967:Estrogens; D014364:Tryptophan