function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bamber, Roger N.', 1],
    ['Bird, Graham J.', 4],
    ['Błażewicz-Paszkowycz, Magdalena', 1],
    ['Esquete, Patricia & Bamber, Roger & Aldea, Cristian', 1],
    ['Esquete, Patricia & Cunha, Marina R.', 2],
    ['Kakui, Keiichi & Angsupanich, Saowapa', 4],
    ['Kakui, Keiichi & Kajihara, Hiroshi & Mawatari, Shunsuke', 4],
    ['Kakui, Keiichi & Yamasaki, Hiroshi', 5],
    ['Larsen, Kim & Shimomura, Michitaka', 2],
    ['Morales-Núñez, Andrés G. & Ramos-Tafur, Gabriel E.', 5],
    ['Tzeng, You-Wei & Wei, Chih-Lin & Ma, Lin & Li, Xinzheng', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);