While the study is intriguing, as you point out it is far too small to be statistically significant.  Other research has pointed out that smokers express ACE2 at higher rates, males express ACE2 at higher rates, and so on.  Indeed, some studies refute that there are racial differences at all in ACE2 expression.  

Dr. James Lyons-Weiler has undertaken to understand the origin of this virus, and something I find extremely disturbing is his observation that sequences submitted to NCBI have apparently been 'un-annotated', or are no longer accessible to researchers, in that database.  This means NCBI is incapable of supporting scientists seeking to develop ways to enable medical treatment of the virus, and implies the data is being censored to prevent understanding the source of the virus.

Facing epidemic and possibly many more deaths from this disease, that's potentially a horrible crime, if it's being done to prevent accountability for those that are responsible.  Even if it's not intentional, it's a horrible lapse in our ability to treat the ill.

He also points out that coronavirii are notoriously unable to be vaccinated against.  Previous animal trials have shown to render vaccinated individuals *more* susceptible to harm from subsequent infection.  One of the possibilities he discusses is that China has undertaken human trials of CoV vaccines, and that is why this epidemic is so harmful in China, but has not shown to be equally harmful elsewhere.

The little we know about 2019 nCoV only reveals how much we don't know.  That situation is made worse by the provable disinformation the enemedia and international health authorities (I'm looking at you, WHO) are disseminating in the false hope of suppressing fear.

The vaccine problem with CoV's is very discouraging, and in the event anyone claims to have a successful vaccine, it will be critically important to carefully examine the data from trials.  Given the misinformation we are being fed, that will be very difficult to do.

Thanks!