A novel CMB polarization likelihood package for large angular scales built from combined WMAP and Planck LFI legacy mapsU. Natale, L. Pagano, M. Lattanzi, M. Migliaccio, L. P. Colombo, A. Gruppuso, P. Natoli and G. PolentaA&A, 644 (2020) A32DOI: https://doi.org/10.1051/0004-6361/202038508