1. Department of Endodontics, Faculty of Dentistry, Oral & Craniofacial Sciences, Centre of Oral Clinical & Translational Sciences, Guy's Dental Hospital King's College London London UK
2. Department of Restorative Dentistry, Division of Endodontics, Faculty of Dentistry Umm Al‐Qura University Makkah Kingdom of Saudi Arabia
3. Faculty of Dentistry, Oral & Craniofacial Sciences, Centre for Host‐Microbiome Interactions, Guy's Dental Hospital King's College London London UK