CONCLUSION—Although the potential influence of cultural factors or other sources of bias cannot be ruled out, the large differences in the prevalence of pain at specific joints suggest that environmental factors are probably responsible, because both populations are of similar genetic stock.
heerrozenwater 
Ik pas het nooit toe maar ik kan er gebiologeerd naar kijken.
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Reisvoorpret
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Van mij mag ze haar koffers pakken
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Dokter, hoe komen m’n knieën zo versleten?
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CONCLUSION—Although the potential influence of cultural factors or other sources of bias cannot be ruled out, the large differences in the prevalence of pain at specific joints suggest that environmental factors are probably responsible, because both populations are of similar genetic stock.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1752882/
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Ja leuk hoor, ik zit nu helemaal klem in m’n strandstoel
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Gefeliciteerd, Ilona!
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