1. Better Health Channel. Cold Sores Available at: https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/cold-sores (accessed 17/11/17).
2. Mayo Clinic. Cold sore. 2015. Available at: https://www.mayoclinic.org/diseases-conditions/cold-sore/basics/causes/con-20021310?p=1 (accessed 14/11/17).