Corrigendum to: A Source-Based Measurement Database for Occupational Exposure Assessment of Electromagnetic Fields in the INTEROCC Study: A Literature Review Approach. Issue 8 (7th May 2019) - Vila, Javier; Bowman, Joseph D; Richardson, Lesley; Kincl, Laurel; Conover, Dave L; McLean, Dave; Mann, Simon; Vecchia, Paolo; van Tongeren, Martie; Cardis, Elisabeth