function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ain & Šundić, Miloje', 2],
    ['Aitlinger', 1],
    ['Barbar, Ziad & Parker, Bruce L. & Skinner, Margaret', 4],
    ['HAITLINGER, Ryszrd & ŠUNDIĆ, Miloje', 20],
    ['Haitlinger, Ryszard', 1],
    ['Haitlinger, Ryszard & Łupicki, Dariusz', 3],
    ['Haitlinger, Ryszard & Šundić, Miloje', 4],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 3],
    ['Luxton, Malcolm', 1],
    ['Noei, Javad', 2],
    ['Saboori, Alireza & Hartmannh, Matthias & Hakimitabar, Masoud', 3],
    ['Saboori, Alireza & Shirvani, Zeinab', 2],
    ['Saboori, Alireza & Šundić, Miloje & Pešić, Vladimir', 1],
    ['Stalstedt, Jeanette & Laydanowicz, Joanna & Lehtinen, Pekka T', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=59)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);