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Year : 2021 | Volume: 65 | Issue Number: 3 | Page: 315-317 COMMENTARYNonverbal closed loop communication during COVID-19 pandemic – Proposal of four tick technique Vijayakumar Vinodhadevi, Srinivasan Omprakash, Ganesamoorthi Arimanickam, Vijayakumar Naveenkumar
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