Randomised trial estimating length of endotracheal tube insertion using gestational age or nasal-tragus length in newborns: a study protocol oleh Abdul Razak, Maheer Faden, Waseemoddin Patel, Omar Aldibasi, Jameel Alghamdi, Abdulaziz Binmanee, Abdullah Hawash Alonazi, Anas Hamdoun, Saud Almugaiteeb, Hamdi Katar, Fabian Lora, Abdullah Alismail, Adrian Lavery, Ibrahim Hamama, Noura Alsaleem, Manal Alshaikh, Lama Alrasheed