This paper is in the following e-collection/theme issue:

Web-based and Mobile Health Interventions 

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Works citing "Effectiveness of a Web-Based Physical Activity Intervention in Patients With Knee and/or Hip Osteoarthritis: Randomized Controlled Trial"

Daniël Bossen, Cindy Veenhof, Karin EC Van Beek, Peter MM Spreeuwenberg, Joost Dekker, Dinny H De Bakker
J Med Internet Res 2013 (Nov 22); 15(11):e257 

According to Crossref, the following articles are citing this article (DOI 10.2196/jmir.2662):

(note that this is only a small subset of citations)

1. Brooks M, Beaulieu JE, Severson HH, Wille CM, Cooper D, Gau JM, Heiderscheit BC. Web-based therapeutic exercise resource center as a treatment for knee osteoarthritis: a prospective cohort pilot study. BMC Musculoskeletal Disorders 2014;15(1):158 [CrossRef]
2. Mordarski S. Pain Management in the Elderly: Transdermal Fentanyl for the Treatment of Pain Caused by Osteoarthritis of the Knee and Hip. BioMed Research International 2014;2014:1 [CrossRef]
3. Kloek CJ, Bossen D, Veenhof C, van Dongen JM, Dekker J, de Bakker DH. Effectiveness and cost-effectiveness of a blended exercise intervention for patients with hip and/or knee osteoarthritis: study protocol of a randomized controlled trial. BMC Musculoskeletal Disorders 2014;15(1):269 [CrossRef]