completed on-line surveys in school settings, having consented to take part. In the USA, permission was requested from school district administrators in Texas. A survey link was then forwarded to parents to first seek consent and then pass on to the participant.

In Finland, a 'snowballing' method and a popular internet site for young people (<http://irc-galleria.net>) recruited school aged participants in the urban Helsinki area.

For Sweden, Norway and Finland, the questionnaire was translated and back-translated into the first language using a translation service, and checked for face validity. In the USA, some terminology was changed (e.g. 'nappies' (UK) to 'diapers' (USA)).

Most (96%) of US participant responses came from 14 urban counties in Texas, (77% breastfeeding initiation, approximating the US national average \[[@CR16]\]). Others (4%) came from Ohio, Michigan, and  _glfw_dlsym(_glfw.egl.handle, "eglSwapInterval");
    _glfw.egl.QueryString = (PFN_eglQueryString)
        _glfw_dlsym(_glfw.egl.handle, "eglQueryString");
    _glfw.egl.GetProcAddress = (PFN_eglGetProcAddress)
        _glfw_dlsym(_glfw.egl.handle, "eglGetProcAddress");

    if (!_glfw.egl.GetConfigAttrib ||
        !_glfw.egl.GetConfigs ||
        !_glfw.egl.GetDisplay ||
        !_glfw.egl.GetError ||
        !_glfw.egl.Initialize ||
        !_glfw.egl.Terminate ||
        !_glfw.egl.BindAPI ||
        !_glfw.egl.CreateContext ||
        !_glfw.egl.DestroySurface ||
        !_glfw.egl.DestroyContext ||
       