title: Calcium, potassium, and iron loss by Apollo VII, 8, IX, X and XI astronauts.
mesh_terms: D000201:Activation Analysis; D000328:Adult; D002118:Calcium / Q000032:analysis / Q000378:metabolism*; D005243:Feces / Q000737:chemistry; D006801:Humans; D007501:Iron / Q000032:analysis / Q000378:metabolism*; D008297:Male; D008722:Methods; D011188:Potassium / Q000032:analysis / Q000378:metabolism*; D012964:Sodium / Q000032:analysis / Q000378:metabolism; D013026:Space Flight
chemical_list: D012964:Sodium; D007501:Iron; D011188:Potassium; D002118:Calcium