function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bien, Steffen & Damm, Ulrike', 2],
    ['Breteler, F. J.', 47],
    ['Kušan, Ivana & Matočec, Neven & Antonić, Oleg & Hairaud, Michel', 1],
    ['Lange, P. J. & Heenan, P. B. & Rolfe, J. R.', 2],
    ['Ruzzier, Enrico & Kovalev, Alexey V.', 2],
    ['ZHENG, HUAN-DI & ZHUANG, WEN-YING', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=55)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);