Sarah E A Smith primary school teacher (twin 1), Lucy K A Carr paediatric speech therapist (twin 2), Elizabeth M Smith retired physician, Russell E A Smith consultant physician
Smith S E A, Carr L K A, Smith E M, Smith R E A.
Same sex twins should give consent for zygosity testing except when medically necessary
BMJ 2016; 355 :i5584
doi:10.1136/bmj.i5584