* All of the names and some of the details in this composite vignette have been changed to preserve privacy.

* Anthony is not his real name. Other deposition details have been changed to protect his privacy.

* Specifically, concentrations of 0.7 mg/cm² or higher.

* This refers to higher-than-clinical levels of fluoride. The low levels meant to discourage tooth decay that are found in fluoride-infused waters have been tested and found safe by most studies.

* Regression is used to find out what equation satisfies a group of data points. Linear regression measures the relationship between a scalar variable called y, for example, IQ, and an independent variable, for example, air pollution, denoted x. It can be predictive when deployed in a valid model.

* The names of Cecil and Eric, and other details of this episode, have been changed to protect their privacy.

* Colorless, crystalline, tasteless, and almost odorless organochlorine compounds used as insecticides whose health and environmental impact was indicted by Rachel Carson’s book Silent Spring in 1962.

* BSTs are banned in European Union countries as well as Canada, Australia, New Zealand, Japan, and Israel.

* Six micrograms is the maximum daily intake level set by the Food and Drug Administration in 1993.

* I found no studies that ascribe cognitive symptoms or any effect on IQ to chikungunya.

* David is not his real name.