Hi Carolyn, thanks for your contribution as evidence evaluator. Yes, all these boxes are based on the search strategies created by the information specialists, the summary of findings tables based on the evidence evaluators work, the worksheets that were build on the summary of findings tables, the worksheet reviews by Domain Chairs and RECOVER Co-chairs and then a consensus process including subject matter experts. Please check the respective worksheets to learn more about what each element in the algorithm is based on. For that I recommend to navigate to the overview file, so you know which PICO question concerns things such as C:V ratio and atropine. You can then navigate to the respective worksheet. There are 2 for atropine (one for treatment of bradycardia at birth and one for transitional newborns during CPR). There is also one worksheet that reviews the evidence on compression:ventilation ratio during CPR of transitional newborn puppies and kittens. To my knowledge, atropine was never advised for this population (newborns at birth), in contrast to adult CPR in dogs and cats where its use is suggested with vagal etiology of CPA.