Suicidal ideation, mental health services, and barriers to care among syringe services program clients who use opioids - Kiran Paudel; Kamal Gautam; Sherry Pagoto; Ran Xu; Jeffrey A. Wickersham; Frederick L. Altice; Sandesh Bhusal; Md. Safaet Hossain Sujan; Michael Copenhaver; Chenglin Hong; Roman Shrestha (PLoS ONE, 2026)