function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Journal of Conchology', 1],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Biodiversity Data Journal', 7],
    ['Iwanami Shoten', 7],
    ['Journal des Museum Godeffroy', 4],
    ['Journal of Natural History', 16],
    ['Molluscan research', 2],
    ['Papéis Avulsos de Zoologia', 3],
    ['Proceedings of the California Academy of Sciences, Series 4', 5],
    ['Proceedings of the Zoological Society of London', 1],
    ['Revue Suisse de Zoologie', 1],
    ['Veliger', 4],
    ['ZooKeys', 77],
    ['Zoological Journal of the Linnean Society', 23],
    ['Zootaxa', 100],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=254)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);