PubMed https://www.ncbi.nlm.nih.gov/pubmed/14715917 brown adipose tissue https://www.ncbi.nlm.nih.gov/pubmed/14715917 PubMed increasing heat production PubMed PubMed triggered PubMed Cannon & Nedergaard, 2004 PubMed brown adipose tissue. this article PubMed http://www.ncbi.nlm.nih.gov/pubmed/14715917 PubMed http://www.ncbi.nlm.nih.gov/pubmed/14715917 PubMed PubMed http://www.ncbi.nlm.nih.gov/pubmed/14715917 PubMed brown adipose tissue UCP1 brown adipose tissue transfers energy