[1] Univ Loughborough, Dept Human Sci, Human Gen Lab, Loughborough, Leics, England
[2] Newcastle Univ, Dept Human Genet, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[3] Indian Stat Inst, Anthropometry & Human Genet Dept, Kolkata 700035, W Bengal, India
[4] Punjabi Univ, Dept Human Biol, Patiala 147002, Punjab, India
[5] Oregon Hlth & Sci Univ, Inst Neurol Sci, Portland, OR 97209 USA