“…In Copenhagen, Denmark, the UC incidence for the period 2003-2005 was found to be much lower or 13.4 per 100,000, increasing however from earlier studies [14]. In Faroe Islands for the period 2005-2009, a very high incidence was found, 26.8 per 100,000, increasing from rather high incidence reported for the period 1981-1988 or 20.3 per 100,000 [15,16].…”