Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Analysis of microbial diversity in sputum samples of COPD frequent exacerbators and infrequent exacerbators. (A), 16S sequencing dilution curve results. (B), QIIME software was used to calculate the Alpha diversity index of both sample groups. E represented COPD frequent exacerbators; I represented COPD infrequent exacerbators. COPD, chronic obstructive pulmonary disease.
