“…These types of inequalities are already present in Hoeffding seminal papers [6], [7] and have seen further development since then. For example, exponential bounds were obtained (in the (sub)Gaussian case) by Hanson and Wright [5], by Bretagnolle [1], and most recently by Giné, Lata la, and Zinn [4] (and the many references therein). As indicated in [4], the exponential bound there is optimal since it involves a mixture of exponents corresponding to a Gaussian chaos of order two behavior, and (up to logarithmic factors) to the product of a normal and of a Poisson random variable and to the product of two independent Poisson random variables.…”