Funding for this research was provided by:
International Diabetes Federation (BR2-R1-PE1)
Received: 11 April 2019
Accepted: 13 August 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of the University of Göttingen and the ethics committee of Syiah Kuala University in Banda Aceh (reference 113000211117). The trial has been registered with ISRCTN registry at ExternalRef removed, registration number ISRCTN68253014.All potential participants were informed that their participation in the study is voluntary, and that even after enrolment they can elect to withdraw from the study at any time. Those who agree to participate must sign the informed consent form (see Additional files InternalRef removed and InternalRef removed: Informed consent forms).
: Not applicable.
: The authors declare that they have no competing interests.