Dear José Manuel Ramírez-Aranda,

The following references may be helpful:

1-Ment Health Fam Med. 2010 Dec; 7(4): 209–221.

PMCID: PMC3083260

The treatment of patients with medically unexplained symptoms in primary care: a review of the literature

Todd M Edwards, PhD,corresponding author Anthony Stern, MD, David D Clarke, MD, Gabriel Ivbijaro, MBBS FRCGP FWACPsych MMedSci DFFP MA, and L Michelle Kasney, BA

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3083260/

2-Public Health. 2012 Oct;126(10):846-54. doi: 10.1016/j.puhe.2012.05.008. Epub 2012 Aug 24.

Estimating the prevalence of medically unexplained symptoms from primary care records.

Morriss R1, Lindson N, Coupland C, Dex G, Avery A.

http://www.ncbi.nlm.nih.gov/pubmed/22922044

3-Medically Unexplained Symptoms (Assessment and Management)

http://patient.info/doctor/medically-unexplained-symptoms-assessment-and-management

4-The role of attachment in medically unexplained symptoms and long-term illness

Gwen Adshead, Elspeth Guthrie

BJPsych Advances May 2015, 21 (3) 167-174; DOI: 10.1192/apt.bp.114.013045

http://apt.rcpsych.org/content/21/3/167

Hoping this will be helpful,

Rafik

Thank you so much Rafik you are very kind. I think I´ll find those articles very helpful