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

Participatory Medicine & E-Patients 

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Works citing "Using Information Technology and Social Networking for Recruitment of Research Participants: Experience From an Exploratory Study of Pediatric Klinefelter Syndrome"

Sharron Close, Arlene Smaldone, Ilene Fennoy, Nancy Reame, Margaret Grey
J Med Internet Res 2013 (Mar 19); 15(3):e48 

According to Crossref, the following articles are citing this article (DOI 10.2196/jmir.2286):

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

1. Johnson KJ, Mueller NL, Williams K, Gutmann DH. Evaluation of participant recruitment methods to a rare disease online registry. American Journal of Medical Genetics Part A 2014;:n/a [CrossRef]
2. Root Kustritz MV. Use of Facebook as a Teaching Tool in a Veterinary Communications Course. Journal of Veterinary Medical Education 2013;40(4):327 [CrossRef]