The American Society of Clinical Oncology (ASCO) and Friends of Cancer Research (Friends) jointly issued new recommendations to further efforts to broaden eligibility criteria in cancer clinical trials with the goal of making clinical trials more accessible to patients. The joint recommendations are detailed in a series of articles published in Clinical Cancer Research, a journal of the American Association for Cancer Research. The series provides a comprehensive examination of eligibility criteria for cancer clinical trials with recommendations to address five specific areas: treatment washout periods, concomitant medications, prior therapies, laboratory reference ranges and test intervals, and patient performance status.