Table 1. Summary of models for positive feedback driven switches and resulting behavior.

Robust On/Off Switch	Clustering Behavior	Loss of Clustering	Reference
√	X	X	[6], [45]
Robust “On” Only	X	X	[14]
X	√	X	[16], [17], [22], [23]
X	√	√	[26]
√	√	√	This Work