The W3C Link Checker, when I allowed 10 levels of recursion (more than needed) and set it to send the Referer, reported error 404 for some URLs in two runs (unless otherwise noted) but I had no problem visiting those URLs:

when I entered <http://cold32.com/6/people/2/female-fashion.htm>: http://www.npr.org/sections/health-shots/2015/08/04/429005094/women-theres-a-reason-why-youre-shivering-in-the-office

when I entered <http://cold32.com>, all the errors being with <mayoclinic.org>:

from <http://cold32.com/2/health/1/frostbite-and-killer-hypothermia.htm>:

http://www.mayoclinic.org/diseases-conditions/frostbite/basics/definition/con-20034608

http://www.mayoclinic.org/diseases-conditions/hypothermia/basics/definition/con-20020453

from <http://cold32.com/2/health/3/pneumonia-colds-and-infections.htm>:

http://www.mayoclinic.org/diseases-conditions/pneumonia/basics/definition/con-20020032

http://www.mayoclinic.org/diseases-conditions/common-cold/basics/definition/con-20019062

from <http://cold32.com/2/health/4/heart-strain-blood-pressure-and-sundry-sickness.htm>:

http://www.mayoclinic.org/diseases-conditions/high-blood-pressure/expert-answers/blood-pressure/faq-20058250

http://www.mayoclinic.org/diseases-conditions/hypothermia/basics/risk-factors/con-20020453

from <http://cold32.com/2/health/7/frail-or-small.htm>:

http://www.mayoclinic.org/diseases-conditions/anorexia/basics/definition/con-20033002 (this was falsely reported in one run of the Link Checker but not in an earlier run)

http://www.mayoclinic.org/diseases-conditions/bulimia/basics/definition/con-20033050

from <http://cold32.com/5/action/1/energy-and-nutrients-but-less-junk-or-hot-food.htm>: http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/taurine/faq-20058177

For this bug report, I guessed the component and the version; the version is actually 4.81.