[1] INST NACL PEDIAT, DEPT CARDIOVASC SURG, MEXICO CITY 04530, DF, MEXICO
[2] INST NACL PEDIAT, DEPT SURG ONCOL, MEXICO CITY 04530, DF, MEXICO
[3] INST NACL PEDIAT, DEPT PATHOL, MEXICO CITY 04530, DF, MEXICO
[4] INST NACL PEDIAT, DEPT NUCL MED, MEXICO CITY 04530, DF, MEXICO
[5] INST NACL PEDIAT, DEPT PEDIAT ONCOL, MEXICO CITY 04530, DF, MEXICO