title: Authors' Reply: The assessment of combined first trimester screening in women of advanced maternal age in an Asian cohort.
authors.affiliation: Department of Obstetrics and Gynaecology, National University of Singapore, Singapore.
authors.forename: Angela Natalie
authors.initials: AN
authors.lastname: Barrett
authors.affiliation: Department of Obstetrics and Gynaecology, National University Hospital, Singapore.
authors.forename: Sarah Weiling
authors.initials: SW
authors.lastname: Li
authors.affiliation: Department of Laboratory Medicine, National University Hospital, Singapore.
authors.forename: Leena
authors.initials: L
authors.lastname: Gole
authors.affiliation: Department of Obstetrics and Gynaecology, Singapore General Hospital, Singapore. obgmac@nus.edu.sg.
authors.forename: Wei Ching
authors.initials: WC
authors.lastname: Tan
authors.affiliation: Department of Obstetrics and Gynaecology, National University Hospital, Singapore.
authors.forename: Arijit
authors.initials: A
authors.lastname: Biswas
authors.affiliation: Department of Obstetrics and Gynaecology, Singapore General Hospital, Singapore. obgmac@nus.edu.sg.
authors.forename: Hak Koon
authors.initials: HK
authors.lastname: Tan
authors.affiliation: Department of Obstetrics and Gynaecology, National University of Singapore, Singapore.
authors.forename: Mahesh
authors.initials: M
authors.lastname: Choolani
mesh_terms: D005260:Female; D006801:Humans; D008423:Maternal Age; D062145:Maternal Serum Screening Tests / Q000379:methods*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*