... Pritchard1
Our other colleagues in the structure project are Peter Donnelly, Daniel Falush and Matthew Stephens. 
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...12
The first version of this program was developed while the authors (JP, MS, PD) were in the Department of Statistics, University of Oxford. 
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...23
Comments and queries can be emailed to us at structure_help@genetics.uchicago.edu. In view of the considerable volume of email that we receive, please check this document carefully first. 
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... program4
The software and the manuscript are available from http://pritch.bsd.uchicago.edu. (Click on ``software''.) 
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... chunk.5
Because of the way that this is parameterized, the map distances in the input file can be in arbitrary units-e.g., genetic distances, or physical distances (under the assumption that these are roughly proportional to genetic distances). Then the estimated value of $ r$ represents the rate of switching from one chunks to the next, per unit of whatever distance was assumed in the input file. E.g., if an admixture event took place ten generations ago, then $ r$ should be estimated as $ 0.1$ when the map distances are measured in cM (this is $ 10*0.01$, where 0.01 is the probability of recombination per centiMorgan), or as $ 10^{-4}=10*10^{-5}$ when the map distances are measured in KB (assuming a constant crossing-over rate of 1cM/MB). The prior for $ r$ is log-uniform. The front end tries to make some guesses about sensible upper and lower bounds for $ r$, but the user should adjust these to match the biology of the situation. 
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... off.6
If the admixture model is used to estimate $ q$ for those individuals without prior population information, $ \alpha$ is updated on the basis of those individuals only. If there are very few such individuals, you may need to fix $ \alpha$ at a sensible value. 
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... below.7
The model of correlated allele frequencies implemented now differs slightly from that in structure Version 1. 
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... modes8
For $ K>1$ here are always multiple symmetric modes that correspond to permuting the labels; these do not cause serious problems Pritchard et al. (2000a) 
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