function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bickel, Daniel J.', 1],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 4],
    ['Gerstaecker, C. E. A.', 2],
    ['Grichanov, Igor Ya.', 1],
    ['Kechev, Mihail & Naglis, Stefan & Tonguç, Alper & Pollet, Marc', 5],
    ['Kejval, Zbyněk & Pollet, Marc', 14],
    ['Naglis, Stefan', 1],
    ['Naglis, Stefan & V., Marco & Bernasconi', 1],
    ['Negrobov, Oleg P. & Naglis, Stefan', 27],
    ['Pollet, Marc & Andrade, Rui & Gonçalves, Ana & Andrade, Pedro', 3],
    ['Pollet, Marc & Ivković, Marija', 3],
    ['Pollet, Marc & Leponce, Maurice & Pascal, Olivier', 1],
    ['Runyon, Justin B.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=68)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);