“…A decline of LOS was seen in 16 studies from 11 countries (Australia, Austria, Bulgaria, China, Germany, Israel, the Netherlands, the Oman, Sweden, the United Kingdom, and the United States [15,19–23,25,27,32,33,38,44,46,47,52,53]). Six studies from 4 countries (Canada, China, Israel and Singapore) described no temporal trends in LOS [9,16,28,31,39,48].…”