Sustained Use of Patient Portal Features and Improvements in Diabetes Physiological Measures. Shimada SL, Allison JJ, Rosen AK, Feng H, Houston TK. J Med Internet Res, 18(7):e179, 01 Jul 2016 Cited by: 47 articles | PMID: 27369696 | PMCID: PMC4947193. Free to read & use.