Periodontal-Systemic Disease: A Study on Medical Practitioners’ Knowledge and Practice oleh Sameena Parveen, Ahmed Shaher Al Qahtani, Esam Halboub, Reem Ali Ahmed Hazzazi, Imtinan Ahmed Hussain Madkhali, Aalaa Ibrahim Hussain Mughals, Safeyah Abdulrahman Ali Baeshen, Aamani Mohammed Moaidi, Mohammed Sultan Al-Ak'hali