function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brandão, Simone N. & Saeedi, Hanieh & Brandt, Angelika', 6],
    ['Chavtur, Vladimir G. & Keyser, Dietmar', 11],
    ['Karanovic, Ivana & Lörz, Anne-Nina', 1],
    ['Kornicker, Louis S. & Iliffe, Thomas M.', 6],
    ['Kornicker, Louis S. & Van, Barry W. M. & Bakel', 15],
    ['Pham, Huyen T. M. & Karanovic, Ivana', 4],
    ['Syme, Anna E. & Poore, Gary C. B.', 6],
    ['Tóth, Emőke & Cséfán, Tünde', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    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);