Chlamydia pneumoniae infection-induced endoplasmic reticulum stress causes fatty acid-binding protein 4 secretion in murine adipocytes — Infection-induced ER stress causes FABP4 secretion — Chlamydia pneumoniae infection–induced endoplasmic reticulum stress causes fatty acid–binding protein 4 secretion in murine adipocytes — Infection-induced ER stress causes FABP4 secretion