Background Reddit's (Reddit Inc) large user base, diverse communities, and anonymity
make it a useful platform for substance use research. Despite a growing body of literature on …

Improved methods of analysis, ie, faster, more discriminatory, more sensitive, less costly,
etc., are needed for all abused substances. Additionally, standard analytical data are …

The global scale of COVID-19 has constrained academics from conducting much person-
facing research. Reactively, trend is increasing for digital-based methodologies capturing …

The Papageno effect concerns how media can play a positive role in preventing and
mitigating suicidal ideation and behaviors. With the increasing ubiquity and widespread use …

Background Despite recent rises in fatal overdoses involving multiple substances, there is a
paucity of knowledge about stimulant co-use patterns among people who use opioids …

Applying machine learning (ML) methods to multi-factor authentication is becoming
increasingly popular. However, there is no comprehensive methodology to evaluate …

Mental health remains a significant challenge of public health worldwide. With increasing
popularity of online platforms, many use the platforms to share their mental health …

Abstract Research summary Darknet marketplaces (DNMs) are global digital marketplaces
used primarily to buy and sell illicit drugs online. High rates of adulterated substances have …

Background: Opioid misuse is a crisis in the United States, and synthetic opioids such as
fentanyl pose risks for overdose and mortality. Individuals who misuse substances …

Background Multiple digital data sources can capture moment-to-moment information to
advance a robust understanding of opioid use disorder (OUD) behavior, ultimately creating …