HSPA1B and cocaine use disorder: HSPA1B gene is one of heat shock protein 70 (HSP70)-encoding transcripts, and it is reported that HSPA1B expression was increased in the postmortem brains of patients with cocaine use disorder exhibiting excited delirium in comparison with other (non-excited delirium) cocaine-related deaths and drug-free controls, concluding that elevated HSPA1B provides a reliable forensic biomarker for the identification of excited delirium (Mash et al., 2009; Johnson et al., 2012).