You have access
Preventing Cross-Contamination during Lyophilization: GMP and Occupational Cleaning Requirements for Nonproduct and Indirect Product-Contact Parts
Richard Denk, Andreas Flückiger, Hirokazu Kisaka, Stephan Krause, Reinhold Maeck, Lars Restetzki, Andreas Schreiner and Rico Schulze
PDA Journal of Pharmaceutical Science and Technology September 2019, 73 (5) 487-495; DOI: https://doi.org/10.5731/pdajpst.2018.009530