title: Ritodrine and serum melatonin levels.
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008550:Melatonin / Q000097:blood*; D011412:Propanolamines / Q000494:pharmacology*; D012312:Ritodrine / Q000494:pharmacology*
chemical_list: D011412:Propanolamines; D012312:Ritodrine; D008550:Melatonin