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. 2020 Jan 6;20:4. doi: 10.1186/s12893-019-0670-x

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© The Author(s). 2020

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — a Typical normalized NIR spectra of parathyroid and other cervical tissue (thyroid, fat and lymph node). The peak wave number ranges 267-281 cm^− 1. The auto-fluorescence intensity of parathyroid is stronger than that of other tissues in the neck. b Comparison of peak auto-fluorescence intensity from the above cervical tissues. * The peak intensity of auto-fluorescence from parathyroid gland is significantly stronger than those from thyroid, fat and lymph node. c Representative histologic section of parathyroid gland tissue. (plotting scale represents 100 μM). d The recovery courses of thyroid function of four thyroid carcinoma patients undergoing total thyroidectomy with central neck dissection. Pre-OP: pre-operation; PO: post-operation; PTH: parathyroid hormone. Normal reference range of PTH: 15~65 pg/mL