| Categories: | Application documents - Documents to ISO/IEC 17025 and ISO 15189 - Laboratories - | 
| Description: | Guidance on the level and frequency of proficiency testing participation | 
| Publication date: | 2021-11-15 | 
| Reference: | EA-4/18 G | 
| Categories: | Application documents - Documents to ISO/IEC 17025 and ISO 15189 - Laboratories - | 
| Description: | Guidance on the level and frequency of proficiency testing participation | 
| Publication date: | 2021-11-15 | 
| Reference: | EA-4/18 G |