function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bamber, Roger N & Bird, Graham & Błażewicz-Paszkowycz, Magdalena', 1],
    ['Bamber, Roger N.', 3],
    ['Bochert, Ralf', 1],
    ['Błażewicz-Paszkowycz, Magdalena & Bamber, Roger N.', 2],
    ['Esquete, P. & Cunha, M. R.', 2],
    ['Jóżwiak, Piotr & Błażewicz-Paszkowycz, Magdalena', 1],
    ['Kakui, Keiichi & Angsupanich, Saowapa', 1],
    ['Kakui, Keiichi & Hiruta, Chizue', 4],
    ['Knight, Julianne S. & Heard, Richard W.', 1],
    ['Larsen, Kim & Bertocci, Iacopo & Froufe, Elsa', 2],
    ['Leach, William Elford', 1],
    ['Tzeng, You-Wei & Ma, Lin & Li, Xinzheng', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);