Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2018 Apr 26;8(3):138–147. doi: 10.9740/mhc.2018.05.138

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2018 CPNP.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License, which permits non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

TABLE 1: .

Study characteristics