function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cerretti, Pierfilippo & Pape, Thomas', 6],
    ['Cumming, Robyn L. & Sebastian, Pascal', 3],
    ['Halliday, R. B.', 1],
    ['Jayawardena, Ruvishika S. & Ariyawansa, Hiran A.', 1],
    ['Jenő Kontschán & Géza Ripka', 1],
    ['Kontschán, Jenő & Starý, Josef', 1],
    ['Thiyagaraja, Vinodhini & Luecking, Robert & Ertz, Damien', 3],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);