[1] Section of Medical Genetics,
[2] Department of Experimental Medicine and Pathology,undefined
[3] Department of Clinical Medicine,undefined
[4] University of Rome La Sapienza,undefined
[5] IRCCS Ospedale L. Spallanzani,undefined
[6] Via Portuense 292,undefined
[7] I-00149 Rome,undefined
[8] Italy,undefined
[9] e-mail: hla.lab@libero.it,undefined
[10] Tel.: +39-06-5584865,undefined
[11] 5581853,undefined
[12] Fax: +39-06-5582227,undefined