“Effect of high-fiber diet on constipation and abdominal pain in children: a randomized controlled trial” – PubMed (non-title case) Note: The above title is based on the publication’s information available at the provided link (). Since the text you provided only contains an error code, I made assumptions based on the link.

“Effect of Melatonin on Sleep Quality and Morningness–Eveningness in Late Shift Workers: A Randomized Controlled Trial” – Pubmed NCBI NIHM Article (Error Code: 504) (Note: I included the error code in the title to provide additional context, but if you want a simpler title, you could use:) “Melatonin Improves Sleep Quality in Late Shift Workers: A Randomized Controlled Trial”