“…The proportion of non-familial caregivers was less than 10% in each of the seven (14.9%) articles (27,32,34,37,45,48,60) where they were part of the sampled populations. In 19% (9/47) of the articles (12,36,47,51,58,61–64), the participants were caregivers of children with chronic diseases. More than half of the articles (53.2%, 25/47) focused on caregivers of people with cancers (9,11,12,29,31,33,37,39,42,43,45,48,53,54,56–58,60–67).…”