43 visiting now: 33 USA 
3 Belgium 
3 UK 
1 Czech Republic 
1 India 
1 Ireland 
1 Taiwan 
1 China 
3 Belgium 3 UK 1 Czech Republic 1 India 1 Ireland 1 Taiwan 1 China 3 Belgium 3 UK 1 Czech Republic 1 India 1 Ireland 1 Taiwan 1 China