1. Department of Nursing and Physical Therapy, University of Almeria, 04120 Almería, Spain
2. Department of Physiotherapy, University of Granada, Spain
3. Health District of La Vega, Andalusian Health Service (Málaga), Spain
4. Department of Physical Education, University of Granada, Spain
5. Department of Nursing and Physical Therapy, University of Almeria, Spain
6. Department of Statistics, University of Granada, Spain