[1] Lab Cent Madrid BRSalud, Madrid, Spain
[2] Hosp Infanta Sofia, Madrid, Spain
[3] Hosp Infanta Leonor, Madrid, Spain
[4] Hosp Henanes, Madrid, Spain
[5] Hosp Sureste, Madrid, Spain
[6] Hosp Infanta Cristina, Madrid, Spain
[7] Hosp Tajo, Madrid, Spain