Thora, A., Bhatnagar, N., Tiwari, A., Lingaiah, P. and Rustagi, N. 2017. Use of henna as a durable pre-operative skin marker for accurate localisation of vertebral level in spine surgery. International Journal of Research in Orthopaedics. 3, 3 (Apr. 2017), 461–465. DOI:https://doi.org/10.18203/issn.2455-4510.IntJResOrthop20171467.