Interviews were conducted in-person using a semistructured interview guide (online supplemental material ... we present a methodological assessment of phase 2 (RDS study) and demographic ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

Objective To develop a best practice guide for managing people with plantar heel pain (PHP). Methods Mixed-methods design including systematic review, expert interviews and patient survey. Data ...

MADRID (Reuters) - Spanish virologists have found traces of the novel coronavirus in a sample of Barcelona waste water collected in March 2019, nine months before the COVID-19 disease was identified ...