import re
txt = '<div>1. <em>Nationella riktlinjer för rörelseorganens sjukdomar</em> (Swedish National Guidelines). 2012, The National Board of Health and Welfare. doi:10.1097/BRS.0b013e31829ff095 https://w...content-available-to-author-only...n.se/publikationer2012/2012-5-1</a></div><div>2. Jevsevar, D.S., et al., <em>The American Academy of Orthopaedic Surgeons evidence-based guideline on: treatment of osteoarthritis of the knee, 2nd edition.</em> J Bone Joint Surg Am, 2013. <strong>95</strong>(20): p. 1885-6. <a href="http://w...content-available-to-author-only...h.gov/pubmed/24288804" rel="noopener noreferrer" target="_blank" style="color: rgb(220, 161, 13);">http://w...content-available-to-author-only...h.gov/pubmed/24288804</a></div><div>3. Namba, R.S., et al., <em>Obesity and perioperative morbidity in total hip and total knee arthroplasty patients.</em> J Arthroplasty, 2005. <strong>20</strong>(7 Suppl 3): p. 46-50. <a href="https://d...content-available-to-author-only...i.org/10.1016/j.arth.2005.04.023" rel="noopener noreferrer" target="_blank" style="color: rgb(220, 161, 13);">https://d...content-available-to-author-only...i.org/10.1016/j.arth.2005.04.023</a></div><div>4. Peter, W.F., et al., <em>Physiotherapy in hip and knee osteoarthritis: development of a practice guideline concerning initial assessment, treatment and evaluation.</em> Acta Reumatol Port, 2011. <strong>36</strong>(3): p. 268-81. <a href="http://w...content-available-to-author-only...h.gov/pubmed/22113602" rel="noopener noreferrer" target="_blank" style="color: rgb(220, 161, 13);">http://w...content-available-to-author-only...h.gov/pubmed/22113602</a></div><div>5. Santoso, M.B. and L. Wu, <em>Unicompartmental knee arthroplasty, is it superior to high tibial osteotomy in treating unicompartmental osteoarthritis? A meta-analysis and systemic review.</em>&nbsp;J Orthop Surg Res, 2017. <strong>12</strong>(1): p. 50.&nbsp;<a href="https://d...content-available-to-author-only...i.org/10.1186/s13018-017-0552-9" rel="noopener noreferrer" target="_blank" style="color: rgb(220, 161, 13);">https://d...content-available-to-author-only...i.org/10.1186/s13018-017-0552-9</a></div><div>6. Management of osteoarthritis. NICE guidelines. NICE Pathway last updated: 22 January 2019. <a href="https://p...content-available-to-author-only...g.uk/pathways/osteoarthritis/management-of-osteoarthritis.pdf" rel="noopener noreferrer" target="_blank" style="color: rgb(220, 161, 13);">https://p...content-available-to-author-only...g.uk/pathways/osteoarthritis/management-of-osteoarthritis.pdf</a></div><div>&nbsp;</div>'
 
exp = "10.\\d{4,9}/[-._;()/:a-z0-9A-Z]+"
pattern = re.compile(exp)
 
print( pattern.findall(txt) )

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