Published on in Vol 9, No 10 (2020): October
![Standardized Protocol Items Recommendations for Observational Studies (SPIROS) for Observational Study Protocol Reporting Guidelines: Protocol for a Delphi Study Standardized Protocol Items Recommendations for Observational Studies (SPIROS) for Observational Study Protocol Reporting Guidelines: Protocol for a Delphi Study](https://asset.jmir.pub/assets/6f994cd2dc69fdcc0e545e879508f3d9.png 480w,https://asset.jmir.pub/assets/6f994cd2dc69fdcc0e545e879508f3d9.png 960w,https://asset.jmir.pub/assets/6f994cd2dc69fdcc0e545e879508f3d9.png 1920w,https://asset.jmir.pub/assets/6f994cd2dc69fdcc0e545e879508f3d9.png 2500w)
1 Care and Public Health Research Institute, Maastricht University, Maastricht, Netherlands
2 Médecins Sans Frontières, New Delhi, India
3 Department of Epidemiology and Data Science, Amsterdam University Medical Centers, Amsterdam, Netherlands
4 Department of Philosophy, Vrije Universiteit, Amsterdam, Netherlands
5 Department of Methodology and Statistics, Tilburg School of Social and Behavioral Sciences, Tilburg University, Tilburg, Netherlands
6 DSM Nutritional Products, Basel, Switzerland
7 School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, Netherlands
*all authors contributed equally