Continuing coverage: Dr. James Vanderploeg and colleagues at UTMB coauthored an article outlining the research that has been done to identify the risks and challenges involved in human commercial spaceflight. The authors describe the development of wearable biomedical monitoring equipment for spaceflight participants and of a medical and physiological database. In addition, the authors also discuss topics such as the risk of electromagnetic interference and ionizing radiation to implanted medical devices in the article "The Human Challenges of Commercial Spaceflight: An Overview of Medical Research Conducted by the University of Texas Medical Branch Through the Federal Aviation Administration Center of Excellence."