Gutierrez L, Roskell N, Castellsague J, Beard S, Rycroft C, Abeysinghe S, Shannon P, Gitlin M, Robbins S. Clinical burden and incremental cost of fractures in postmenopausal women in the United Kingdom. Bone. 2012 Sep 1;51(3):324-31.
Calvet X, Navarro M, Gil M, Mas P, Rivero E, Sanfeliu I. Seroprevalence and epidemiology of Helicobacter pylori infection in patients with cirrhosis. J Hepatol. 1997 Jun;26(6):1249-54.
Glass RL, Rothman KJ, Espinal F, Velez H, Smith NJ. Prevalence of human dental caries and water-borne trace metals. Arch Oral Biol. 1973 Sep;18(9):1099-104. doi: 10.1016/0003-9969(73)90083-6