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Table 1 Search term combination and total hits from the systematic search of MEDLINE, Scopus, PubMed and Cochrane Central databases

From: Impact of heterotopic ossification following lumbar total disk replacement: a systematic review

Search combination and total hits

Search Combination

Total Hits

“Heterotopic ossification” AND lumbar AND arthroplasty

89

“Heterotopic ossification” AND lumbar AND “disc replacement OR disk replacement”

94

“Heterotopic ossification” AND lumbar AND “disc OR disk” AND prosthesis

80

Heterotopic AND bone AND lumbar AND arthroplasty

55

Heterotopic AND bone AND lumbar AND “disc replacement OR disk replacement”

47

Heterotopic AND bone AND lumbar AND “disc OR disk” AND prosthesis

44

“Heterotopic ossification” AND lumbar AND “degenerative disc disease OR degenerative disk disease”

54

“Heterotopic ossification” AND lumbar AND “degenerative disc disease OR degenerative disk disease”

24