I have prepared Jupyter Notebook with some findings and I shared it with other team members through GitHub to get their feedback in a written form. It used to work like this when working together on a piece of code but does not work for Jupyter Notebook. In GitHub that would mean commenting on HTML or JSON level (internal markup for .ipynb files), not on the document level. An alternative would be for team members to clone the repo and puts inline comments in the document. That's an additional effort for other team member I would like to avoid.
What is the way you collaborate, peer review and provide feedback when working on Jupyter Notebooks?