Media type: E-Article Title: Patient enrollment and logistical problems top the list of difficulties in clinical research: a cross-sectional survey Contributor: Cullati, Stéphane; Courvoisier, Delphine S.; Gayet-Ageron, Angèle; Haller, Guy; Irion, Olivier; Agoritsas, Thomas; Rudaz, Sandrine; Perneger, Thomas V. Published: Springer Science and Business Media LLC, 2016 Published in: BMC Medical Research Methodology, 16 (2016) 1 Language: English DOI: 10.1186/s12874-016-0151-1 ISSN: 1471-2288 Keywords: Health Informatics ; Epidemiology Origination: Footnote: Access State: Open Access