RT Journal Article SR Electronic T1 Methodological issues on analysis of prediction tools in evaluating febrile young infants at risk for serious infections JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP emermed-2019-209351 DO 10.1136/emermed-2019-209351 A1 Mehdi Naderi A1 Siamak Sabour YR 2020 UL http://emj.bmj.com/content/early/2020/01/09/emermed-2019-209351.abstract AB