systematic review Internet meta-analysis decision making National Center for Biotechnology Information NCBI NLM MEDLINE review humans pubmed abstract nih national institutes of health national library of medicine psychological randomized controlled trials as topic adaptation self care pmid:16235356 doi:10.1002/14651858.cd004274.pub4 e murray j burns i nazareth chronic disease* / psychology chronic disease* / therapy computer-assisted instruction / methods* health education / methods patient education as topic / methods* patient education as topic / standards self efficacy social support