Particularly at issue here may be the smaller degree of socioeconomic barriers to treatment in this sample compared with a truly representative national sample. (care.diabetesjournals.org)
A 2013 Harvard Berkman Center / Pew Internet poll conducted with a large and representative national sample found 94 percent of teens who use social media are on Facebook. (huffingtonpost.com)
Respondents to the CCS, itself based on a representative national sample drawn from mailing addresses, are invited to join the SCE internet panel. (newyorkfed.org)