“…If known to be variable between ethnic groups, please report) Prevalence of PCG varies between different ethnic groups and ranges from 1 in 18,500 in the UK [14], 1 in 3300 in Andhra Pradesh (Southern India) [15], 1 in 2500 in the middle-east (Saudi Arabia) [16], and 1 in 1250 in the Rom (Gypsy) population of Slovakia [17]. A higher prevalence is observed in ethnic groups in which parental consanguinity is common [18,19].…”