Collado and co-researchers review factors relating to the settlement of a stable gut microbiota in preterm infants. See p. 726. Cover design by Erin DeWalt.

In their clinical review, Hooper and co-researchers suggest that the timing of clamping the umbilical cord should be based on an infant's physiology. (See p. 608). Image at the top right courtesy of Satyan Lakshminirusimha (see Commentary on p. 615).

Chiang and coauthors investigated the association between common allergic diseases and the subsequent risk of developing primary immune thrombocytopenia during childhood. Photo of children from SerrNovik/© iStockphoto/Thinkstock; allergy cells from MarcelC © iStockphoto/Thinkstock. See p. 597. Cover design by Matt Hansen.

Clark and Cecil’s review provides clinicians with an overview of the information available on identifying and treating cerebral creatine deficiency syndromes. See the article on p. 398. From Alliance/© iStockphoto/Thinkstock. Cover design by Matt Hansen.

Kayange and colleagues conducted a systematic review of communitybased studies describing the prevalence of proteinuria, hematuria, abnormal imaging, and kidney dysfunction among children in sub-Saharan Africa. See the article on p. 272. Cover image: BSIP SA/Alamy. Cover design by Matt Hansen.

A fruit basket drawn by a child represents the importance of nutritional elements in human health. This issue of Pediatric Research brings together a collection of invited review articles on pediatric nutrition and the microbiome. Painting by Lina Dammann, 2007; courtesy of Olaf Dammann, MD. Cover design by Matt Hansen.