Cardiovascular care guideline implementation in community health centers in Oregon: a mixed-methods analysis of real-world barriers and challenges oleh Rachel Gold, Arwen Bunce, Stuart Cowburn, James V. Davis, Celine Hollombe, Christine A. Nelson, Jon Puro, John Muench, Christian Hill, Victoria Jaworski, MaryBeth Mercer, Colleen Howard, Nancy Perrin, Jennifer DeVoe