Overdose Detection Among High-Risk Opioid Users Via a Wearable Chest Sensor in a Supervised Injecting Facility: Protocol for an Observational Study oleh Basak Tas, Will Lawn, Marianne Jauncey, Mark Bartlett, Paul Dietze, Daniel O'Keefe, Nico Clark, Bruce Henderson, Catriona Cowan, Osian Meredith, John Strang