| Gene | Laboratory |
| NPHP1 | NE Thames, London | NPHP1 | Glasgow, Scotland | NPHP1 | Utrecht, Netherlands | NPHP1 | Helsinki and Tampere, Finland | NPHP1 | Malaga, Spain | NPHP1 | Granada, Spain | NPHP1,2 | Gosselies, Belgium | NPHP1,2 | Brussels, Belgium | NPHP1–3 | Aachen, Germany | NPHP1–4 | Paris, France | NPHP1–4 | Weißwasser, Germany | NPHP1–4 | Tubingen, Germany | NPHP1–4, 7 | Rostock, Germany | NPHP1–4, –9, NPHPL1 | Barcelona, Spain | NPHP1–4, –9, NPHPL1 | Oviedo, Spain | NPHP1–4, –9, NPHPL1 | Leuven, Belgium | NPHP1–4, 6–9 | Ingelheim, Germany |
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