The sickle cell trait and leg ulceration.
D000755:Anemia, Sickle Cell / Q000150:complications* / Q000453:epidemiology; D001898:Borrelia; D006801:Humans; D007563:Jamaica; D007871:Leg Ulcer / Q000453:epidemiology / Q000209:etiology*; D014647:Varicose Ulcer / Q000150:complications