1. A systematic approach to initial data analysis is good research practice 
Marianne Huebner, PhD, Werner Vach, Dr rer. nat., Saskia le Cessie, PhD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 151, Issue 1, Pages (January 2016)
DOI: /j.jtcvs
Copyright © 2016 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
The framework for initial data analysis as an integral part of the research process. IDA, Initial data analysis.
The Journal of Thoracic and Cardiovascular Surgery  , 25-27DOI: ( /j.jtcvs )
Copyright © 2016 The American Association for Thoracic Surgery Terms and Conditions

3. The framework for initial data analysis as an integral part of the research process.
The Journal of Thoracic and Cardiovascular Surgery  , 25-27DOI: ( /j.jtcvs )
Copyright © 2016 The American Association for Thoracic Surgery Terms and Conditions