Luis Ostrosky-Zeichner1, Jack D Sobel2. 1. Division of Infectious Diseases, McGovern Medical School, Memorial Hermann Texas Medical Center, Houston, TX 77030, USA. Electronic address: Luis.Ostrosky-Zeichner@uth.tmc.edu. 2. Infectious Diseases, Wayne State University School of Medicine, Detroit, MI 48322, USA. Electronic address: jsobel@med.wayne.edu.