Author information:
(1)Diabetic Foot Unit, Complutense University Clinic, Madrid, Spain; Instituto 
de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, 
Spain. Electronic address: fraalv@hotmail.com.
(2)Diabetic Foot Unit, Complutense University Clinic, Madrid, Spain; Instituto 
de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, 
Spain.
(3)Diabetic Foot Unit, La Paloma Hospital, Las Palmas de Gran Canaria, Spain.