function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Halliday, R. B.', 1],
    ['Jenő Kontschán & Géza Ripka', 1],
    ['Kontschan, Jeno', 1],
    ['Kontschán, J.', 2],
    ['Kontschán, Jenõ', 8],
    ['Kontschán, Jenő', 7],
    ['Kontschán, Jenő & Ermilov, Sergey G. & Friedrich, Stefan', 2],
    ['Kontschán, Jenő & Friedrich, Stefan', 2],
    ['Kontschán, Jenő & Kiss, Balázs', 3],
    ['Kontschán, Jenő & Starý, Josef', 3],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    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);