function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anlaş, S.', 1],
    ['Assing, V.', 1],
    ['Assing, Volker', 9],
    ['Bedard, Nicolas & Brunke, Adam & Bloin, Pierrick', 1],
    ['Bordoni, A.', 2],
    ['Bordoni, Arnaldo', 1],
    ['Ghahari, H. & Anlaş, S. & Sakenin, H. & Ostovan, H.', 1],
    ['Türkmen, Senem Özdemir & Şimşek, Burcu Şabanoğlu & Sert, Osman', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);