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. 2013 Nov 28;2(2):e52. doi: 10.2196/resprot.2886

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©Sarah L Cutrona, Douglas W Roblin, Joann L Wagner, Bridget Gaglio, Andrew E Williams, Rosalie Torres Stone, Terry S Field, Kathleen M Mazor. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 24.11.2013.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Research Protocols, is properly cited. The complete bibliographic information, a link to the original publication on http://www.researchprotocols.org, as well as this copyright and license information must be included.

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Health communication network tool. Study participants were provided with blank worksheets and asked: “Please mark one stick figure for each person you can think of that you communicate with about routine health topics…these are people you would communicate with about routine health topics like cancer screening, vaccine shots, diet, or exercise.” The worksheet was used to facilitate the estimation of the number of emails or postcards promoting colorectal cancer screening that they would send to members of their social network.