title: Five authors reply.
authors.affiliation: Section for Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand.
authors.forename: Ammarin
authors.initials: A
authors.lastname: Thakkinstian
authors.forename: Gareth J
authors.initials: GJ
authors.lastname: McKay
authors.forename: Julie
authors.initials: J
authors.lastname: Silvestri
authors.forename: Usha
authors.initials: U
authors.lastname: Chakravarthy
authors.forename: John
authors.initials: J
authors.lastname: Attia
mesh_terms: D003175:Complement C2 / Q000235:genetics*; D011415:Complement Factor B / Q000235:genetics*; D006801:Humans; D008268:Macular Degeneration / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide
chemical_list: D003175:Complement C2; D011415:Complement Factor B