CSF3 and Recurrent upper respiratory tract infections: ECOG, Eastern Cooperative Oncology Group; ANC, absolute neutrophil count; GCSF, granulocyte colony stimulating factor; MDRO, multidrug-resistant organism; IV, intravenous; CVC, central venous catheter; ABSSSI, acute bacterial skin and skin structure infection; UTI, urinary tract infection; LRTI, lower respiratory tract infection; URTI, upper respiratory tract infection.