Suggested Chinese Drywall comment for Appraisal reports

it has become apparent that we, Appraisers are now being asked to determine if any "chinese drywall" has been used in the properties we inspect.
Of course, we have no real way to know, but a comment is required nonetheless, even if just to say that we "are aware or not aware" of any such material, and that we have asked the "owners, brokers or others to verify such.
Here's some text you might like to use - feel free to amend it to your liking.

Chinese Drywall refers to defective or tainted drywall imported from China from 2001 to 2007 which emits sulfur gasses which usually (but not always) creates a noxious odor and corrodes copper and other metal surfaces.
Chinese drywall can also cause adverse health effects, although experts disagree whether these effects are merely irritants or present a more imminent or chronic health hazard.

When determining whether or not a home has been affected by toxic Chinese drywall, visual inspections can be done very effectively and accurately by anyone. Homeowners can simply look for the basic fingerprint that defective drywall leaves behind.

Three tell-tale signs:
1. Blackened and corroded ground wires connected to the back of the home’s air-conditioning unit.
2. Blackened air conditioning coils on the back of the home’s air conditioning unit. Be sure to look at the air handling section of the air conditioning unit..
3. “Made in China” labels on the back of the drywall. Also, labels stamped “Knauf” usually indicate that the drywall was made in China.

Disclosure:
As an appraiser I am not qualified to determine the chemical composition of the subject properties building materials, but based on conversations with owners, occupants and or professionals involved in this transaction there seems to be no “Chinese drywall” on the property.
It is recommended that a certified inspector would be better suited to make this determination.