The European Union's approach has been to limit the nicotine concentration in e-liquids and the volume of an e-liquid refill and disposable cartridges
TEREA Traditional tobacco feel Some long-term HEETS users prefer the slightly drier, sharper character produced by older blade-based IQOS devices, especially with stronger tobacco blends
Certain medications: Some medications, like blood thinners, can increase the risk of gum bleeding
Most urban areas will have a selection of shops, but in rural areas, options may be limited
To overcome these limitations, statistical methods designed for the analysis of network data (e.g., SIENA models) which simultaneously estimate selection homophily and peer influence effects in the same model, whilst accounting for network dynamics, network structure, and the characteristics of the actors in the network, are recommended (Mercken et al., 2009, 2012