http://www.nlm.nih.gov/medlineplus/ MedLine article https://www.nlm.nih.gov/medlineplus/ http://www.nlm.nih.gov/medlineplus/ https://www.nlm.nih.gov/medlineplus/ http://www.nlm.nih.gov/medlineplus/ bowel cleanser MedlinePlusDrug Sodium Phosphate MedlinePlusDrug Sodium Phosphate. sodium phosphates source https://www.nlm.nih.gov/medlineplus/ http://www.nlm.nih.gov/medlineplus/ bowel cleanser bowel cleanser http://www.nlm.nih.gov/medlineplus/ bowel cleanser sodium phosphate bowel cleanser