zzzs pronounced as Z-Z-Zs?

Context:
Insomniacs desperate for some zzzs may one day have a safer way to get them. Scientists have developed a new sleep medication that has induced sleep in rodents and monkeys without apparently impairing cognition, a potentially dangerous side effect of common sleep aids. The discovery, which originated in work explaining narcolepsy, could lead to a new class of drugs that help people who don't respond to other treatments.

More:
http://news.sciencemag.org/sciencenow/2013/04/a-sleep-drug-without-the-side-ef.html?ref=hp