title: Correspondence.
authors.affiliation: Human Genetics Unit, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka. nirmala@anat.cmb.ac.lk.
authors.forename: Nirmala
authors.initials: N
authors.lastname: Sirisena
authors.affiliation: Human Genetics Unit, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.
authors.forename: Vajira H W
authors.initials: VHW
authors.lastname: Dissanayake
mesh_terms: D058165:22q11 Deletion Syndrome / Q000175:diagnosis*; D002869:Chromosome Aberrations; D025063:Chromosome Disorders / Q000235:genetics / Q000503:physiopathology*; D003582:Cytogenetics / Q000379:methods*; D006801:Humans; D007621:Karyotyping; D012720:Severity of Illness Index; D013188:Sri Lanka