<p>Generally, as a frontline output, the author has tried his/her best and is appreciated.</p><p><strong>Method</strong>: 'Retrospective case series' is Not clear. I think the number of patients was about 187 and more than the case series (most of the time in epidemiology case series: 5-12).</p><p><strong>Result</strong>:</p><p>The author has tried to describe the EPTB. I could not see any research hypothesis in the description. &nbsp;There is no data indicating 'The strength of association was strongest in the age range of 31-40 years'.</p><p><strong>Public health significance:</strong></p><p>There is no additional scientific evidence contributed rather than a simple description of the EPTB.</p><p>Based on the scientific conference audience, the description of PTB is less significant.</p>