Early changes of body composition in human immunodeficiency virus-infected patients: neither body weight nor body mass index but tetrapolar body impedance analysis indicates significant malnutrition. - Ott,M.; Lembcke,B.; Fischer,H.; Jägel,R.; Polat,H.; Geier,H.; Rech,M.; Staszeswki,S.; Helm,E.B.; Caspary,R. (Am J Clin Nutr, 1993)