title: Challenges of examining complex genetic disorders like GERD.
authors.affiliation: University of Pittsburgh School of Medicine, Pittsburgh, USA. sro1205@yahoo.com
authors.forename: Susan R
authors.initials: SR
authors.lastname: Orenstein
authors.forename: David C
authors.initials: DC
authors.lastname: Whitcomb
authors.forename: Michael M
authors.initials: MM
authors.lastname: Barmada
mesh_terms: D000328:Adult; D002648:Child; D016000:Cluster Analysis; D004777:Environment; D005764:Gastroesophageal Reflux / Q000209:etiology / Q000235:genetics* / Q000517:prevention & control; D020022:Genetic Predisposition to Disease; D006801:Humans; D008957:Models, Genetic; D010641:Phenotype; D018433:Twin Studies as Topic