Received: 13 June 2021
Accepted: 24 January 2022
First Online: 5 February 2022
: This study received ethical approval from in China from the institutional review board of China Pharmaceutical University (Nanjing, China). While in Zambia from the National Health research Authority (NHRA), Ministry of health public health and research unit and relevant authorities at the ministry of health.
: Not applicable.
: The authors declare that they have no competing interests.