Johnstone, J., Meade, M., Marshall, J., Heyland, D. K., Surette, M. G., Bowdish, D. M., . . . Cook, D. J. (2015). Probiotics: Prevention of Severe Pneumonia and Endotracheal Colonization Trial—PROSPECT: protocol for a feasibility randomized pilot trial. Pilot Feasibility Stud.

Johnstone, Jennie, Maureen Meade, John Marshall, Daren K. Heyland, Michael G. Surette, Dawn ME Bowdish, Francois Lauzier, Lehana Thebane, et Deborah J. Cook. "Probiotics: Prevention of Severe Pneumonia and Endotracheal Colonization Trial—PROSPECT: Protocol for a Feasibility Randomized Pilot Trial." Pilot Feasibility Stud 2015.

Johnstone, Jennie, et al. "Probiotics: Prevention of Severe Pneumonia and Endotracheal Colonization Trial—PROSPECT: Protocol for a Feasibility Randomized Pilot Trial." Pilot Feasibility Stud 2015.