Footnotes

• Contributors GM and ALD drafted the article. AJD and NDE extensively edited the article. All authors are content with the submitted version which we feel is a reflection of joint work by all the authors.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests GM reports personal fees from Nutricia and personal fees from Danone, outside the submitted work. NDE reports research funding from Prolacta Biosciences US and Danone Early Life Nutrition, as well as speaker fees from Baxter and Nestle Nutrition Institute outside the submitted work.

• Provenance and peer review Commissioned; internally peer reviewed.

• Data sharing statement There are no additional data available.