Essence Of Wellness Chiropractic Center,
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5367004/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5367004/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5367004/
Worth reading especially as children are still carrying heavy bags to school.
BMC Musculoskelet Disord. 2017 Mar 27;18(1):67. doi: 10.1186/s12891-017-1424-5.