Adequate surveillance of hard-to-reach and 'hidden'subpopulations is crucial to containing
the HIV epidemic in low prevalence settings and in slowing the rate of transmission in high …

Background:'Hard-to-reach'is a term used to describe those sub-groups of the population
that may be difficult to reach or involve in research or public health programmes. Application …

Snowball sampling is a commonly employed sampling method in qualitative research;
however, the diversity of samples generated via this method has repeatedly been …

Standard statistical methods often provide no way to make accurate estimates about the
characteristics of hidden populations such as injection drug users, the homeless, and artists …

Network sampling emerged as a set of methods for drawing statistically valid samples of
hard-to-reach populations. The first form of network sampling, multiplicity sampling, involved …

Many populations of interest present special challenges for traditional survey methodology
when it is difficult or impossible to obtain a traditional sampling frame. In the case of such …

This paper introduces the use of social network analysis theory and tools for implementation
research. The social network perspective is useful for understanding, monitoring …

Cost effective and targeted prevention, intervention and treatment programs for hard-to-
reach populations at risk for HIV and other infections rely on the collection of quality data …

Objective The purpose of this review was to explore the association between forward head
posture, rounded shoulders, and increased thoracic kyphosis. Methods The PubMed, ERIC …

Respondent‐driven sampling (RDS) is a network‐based method for sampling hidden and
hard‐to‐reach populations that has been shown to produce asymptotically unbiased …