'once they see blood then the mood for sex is spoiled' A qualitative exploration of female sex worker's male client views of menstruation, sex during menses and the menstrual disc. - Osire, Edyth; Young, Sophie; Awiti, Enid; Akinyi, Cynthia; Otieno, Fredrick; Phillips-Howard, Penelope A.; Mehta, Supriya D.; Mason, Linda (PLoS ONE, 2024)