Co-author Wonder Agbemavi, a member of the ANU’s School of Demography, has provided details of a recent publication:

Okyere et al. AIDS Research and Therapy (2023) 20:40
https://doi.org/10.1186/s12981-023-00537-9
Open Access

‘Utilisation of traditional healers among older
people living with HIV in South Africa: a WHO
SAGE well-being of older people study’
Joshua Okyere, Castro Ayebeng, Bernard Afriyie Owusu,
Wonder Agbemavi, Joseph Kwarteng Amoako, and Kwamena Sekyi Dickson