title: Metformin: a differential diagnosis for weight loss, altered bowel habits and B12 deficiency anemia in an elderly diabetic.
authors.affiliation: Hospital Raja Permaisuri Bainun, Ipoh, Medicine, Jalan Hospital, Ipoh, Perak 30990, Malaysia. keabcmk@hotmail.com.
authors.forename: B
authors.initials: B
authors.lastname: Cheong