Table 1.
Laboratories from various countries participating to the UK National External Quality Assessment Service (UK NEQAS)
| Country | Number | Country | Number |
| Austria | 3 | Latvia | 1 |
| Belgium | 7 | Malaysia | 1 |
| Croatia | 2 | Malta | 1 |
| Cyprus | 1 | New Zealand | 3 |
| Denmark | 2 | Norway | 9 |
| Eire | 15 | Portugal | 31 |
| Estonia | 1 | Republic of Chile | 1 |
| Finland | 5 | Singapore | 1 |
| France | 29 | South Africa | 3 |
| Germany | 9 | Spain | 68 |
| Greece | 16 | Sweden | 14 |
| Hong kong | 1 | Switzerland | 7 |
| Hungary | 5 | The Netherlands | 1 |
| Israel | 8 | Turkey | 2 |
| Italy | 65 | UK | 136 |
| Kingdom of Saudi Arabia | 1 | United Arab Emirates | 1 |
| Kuwait | 1 | USA | 3 |