His later books included two substantial collections of letters.
NK: Made substantial contributions to the collection of data as well as the interpretation and analysis of the data.
HS participated in the design of the study, provided substantial support in the collection of data related to the risk factors, helped to supervise the work and to draft the manuscript.
All authors have made substantial contribution in designing the study and collection of data.
SR participated in the study design, advised on the collection of data and made substantial contributions to the data interpretation and writing of the paper.
LW carried out the experimental work and collection of data, analysis and interpretation of results, drifting and substantial editing the manuscript.
TK was responsible for conception and participation in design, experimental work and collection of data, analysis and interpretation of results, drifting and substantial editing the manuscript.
UKS, WL, DW, AHT, FJ, GB, LK, and SP made substantial contributions to the conduct of the study, the treatment of patients, and the collection of data.
However, this may require additional data collection and the overcoming of substantial problems of data linkage, which can be justified only if additional variables improve risk adjustment.
Is everything just a collection of data?
