TY - JOUR T1 - What does expert opinion in guidelines mean? a meta-epidemiological study JF - Evidence Based Medicine JO - Evid Based Med SP - 164 LP - 169 DO - 10.1136/ebmed-2017-110798 VL - 22 IS - 5 AU - Oscar J Ponce AU - Neri Alvarez-Villalobos AU - Raj Shah AU - Khaled Mohammed AU - Rebecca L Morgan AU - Shahnaz Sultan AU - Yngve Falck-Ytter AU - Larry J Prokop AU - Philipp Dahm AU - Reem A Mustafa AU - Mohammad H Murad Y1 - 2017/10/01 UR - http://ebm.bmj.com/content/22/5/164.abstract N2 - ER -