“…Nonetheless, many logistical challenges exist, including financial complexities, transportation across state or country borders, and regulatory barriers. While these challenges have received substantial attention in other fields of research, such as clinical trials for cancer and other disease areas [ 184 , 185 , 186 , 187 , 188 , 189 , 190 , 191 , 192 , 193 , 194 , 195 , 196 , 197 ], their role in DoC research studies has been relatively underexplored and represents a vital area for ongoing advocacy and investigation. Initiatives to enhance equity in clinical-trial enrollment, including resources to promote diverse and inclusive enrollment and training for researchers, have been made available by FDA [ 198 ].…”