Improving our knowledge of hominoid evolution both complicates and clarifies studies of human origins.
[38], [39], [41] We contacted several trial investigators [37], [39] [46] to clarify study procedures.
We conducted duplicate independent citation screening and data abstraction and corresponded with lead investigators to clarify study methods where needed.
If required, we will contact the authors of the reports for further information to clarify study eligibility.
The MalariaGEN study was approved by all ethics committees, although in some cases the approval process consisted of multiple rounds of correspondence to clarify study design and rationale.
Where data are found to be missing, we will contact the corresponding author of the study to request the missing data or to clarify study details.
Where required, correspondence with the relevant investigators would take place to clarify study eligibility and results or if the article was not readily accessible.
The cause of diseases will be clarified by studies on the evolutional background of vertebrates.
However, in cases where more recent studies clarified or contradicted earlier studies, we based our dataset on the results of the updated studies.
Inconsistencies in interpreting linguistic and cultural differences were clarified among study team members throughout the data analysis process.
