1. Google Trends: a Web-based tool for real-time surveillance of disease outbreaks;Carneiro;Clin Infect Dis,2009
2. NOAA. Gridded climate divisional data set (CLIMDIV). nClimDiv (climate indices). Available from: https://www.ncdc.noaa.gov/monitoring-references/maps/us-climate-divisions.php. Accessed March 25, 2016.
3. Met Office. Climate summaries. Available from: http://www.metoffice.gov.uk/climate/uk/summaries. Accessed March 25, 2016.
4. Google Note. An improvement to our geographical assignment was applied retroactively from 1/1/2011. Available from: https://support.google.com/trends/answer/1383240?hl=en. Accessed September 4, 2016.
5. Evolving understanding on the etiology of thermally provoked itch;Murota;Eur J Pain,2015