Funding for this research was provided by:
Kingdom of Saudi Arabia
Article History
First Online: 12 January 2019
Compliance with Ethical Standards
:
: SA was supported by an unrestricted grant from the Ministry of Higher Education, Kingdom of Saudi Arabia. The latter had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation of the manuscript.
: John M. Wild, Saleh Aljarudi, Philip E.M. Smith and Carlo Knupp declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with ethical standards of the Local Research and Ethics Committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study had approval from the Local Research and Ethics Committee. For this type of study, formal consent is not required.