American Chemical Society 1 American Physical Society (APS) 4 Cambridge University Press 1 Copernicus Publications 5 Frontiers Media S.A. 3 Hindawi Limited 8 Hindawi-Wiley 1 IOP Publishing 7 MDPI AG 22 Nature Portfolio 5 SAGE Publications 2 SPIE 3 Springer 11 Springer Nature Taylor & Francis 9 Wiley 13