function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carmen, Maria Del', 2],
    ['Diez, Fernando & Coscaron, Maria del Carmen', 4],
    ['Dursun, Ahmet & Fent, Meral', 3],
    ['Ghahari, Hassan & Moulet, Pierre & Cai, Wanzhi & Karimi, Javad', 1],
    ['Kment, Petr & Rédei, Dávid', 1],
    ['Krüger, Andreas', 2],
    ['Krüger, Andreas & Deckert, Jürgen', 1],
    ['Moulet, Pierre', 1],
    ['Putshkov, Pavel V. & Pluot-Sigwalt, Dominique', 20],
    ['Swanson, Daniel R.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1],
    ['Yildirim, E. & Moulet, P. & Külekçi, G. & Bulak, Y.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=40)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);