Authors’ contributions
M.A.G.S.P., X.A.R.T.T. and A.G.O. participated in the protocol design, collection of clinical information, statistical analysis and were involved in editing the manuscript; M.A.G.S.P., R.U.C.N., J.J.D.M., H.I.C.N., J.M.G.D., M.J.G.R., J.O.V.G., K.V.A.D., M.F.Z.C., F.Y.G.P., F.J.B.C., C.F.O., A.G.O., G.C.G., E.C.P., G.A.C.C., A.O.C.F. were involved in the protocol design, identification and inclusion of candidates, and critically revised the article for important intellectual content; all the authors reviewed and approved the final version to be published.