Phillips, C., Allen, S. J., Wareham, K., Bradley, C., Harris, W., Dhar, A., . . . Mack, D. (2012). A multicentre randomised controlled trial evaluating lactobacilli and bifidobacteria in the prevention of antibiotic-associated diarrhoea in older people admitted to hospital: The PLACIDE study protocol. BMC Infectious Diseases, 12(1), p. 108. doi:10.1186/1471-2334-12-108

Phillips, Ceri, et al. "A Multicentre Randomised Controlled Trial Evaluating Lactobacilli and Bifidobacteria in the Prevention of Antibiotic-associated Diarrhoea in Older People Admitted to Hospital: The PLACIDE Study Protocol." BMC Infectious Diseases 12, no. 1 (2012): 108.

Phillips, Ceri, et al. "A Multicentre Randomised Controlled Trial Evaluating Lactobacilli and Bifidobacteria in the Prevention of Antibiotic-associated Diarrhoea in Older People Admitted to Hospital: The PLACIDE Study Protocol." BMC Infectious Diseases 12.1 (2012): 108.