2 Hospital Clinic of Barcelona, Barcelona, Spain; University of Barcelona, School of Medicine and Health Sciences, Barcelona, Spain; Institut d'Investigacions Biomèdiques Agust Pi i Sunyer, Barcelona, Spain.
3 Hospital Clinic of Barcelona, Barcelona, Spain; University of Barcelona, School of Medicine and Health Sciences, Barcelona, Spain; Institut d'Investigacions Biomèdiques Agust Pi i Sunyer, Barcelona, Spain. Electronic address: pgines@clinic.cat.