Concurrent intravenous immunoglobulin and platelet transfusion for refractory alloimmune thrombocytopenia in patients undergoing allogeneic hematopoietic stem cell transplantation Moazzam Shahzad; Muhammad Kashif Amin; Maggie Nelson; Abhinav Vyas; Joe S. Al-Ramahi; Nausheen Ahmed; Rajat Bansal; Haitham Abdelhakim; Leyla Shune; Al-Ola Abdallah; Anurag K. Singh; Sunil H. Abhyankar; Joseph P. McGuirk; Muhammad Umair Mushtaq;