function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Castro-Huertas, Valentina & Minghetti, Eugenia', 1],
    ['Fallén, Carl Fredrik', 1],
    ['Ghahari, Hassan & Moulet, Pierre', 27],
    ['Ghahari, Hassan & Moulet, Pierre & Behnood, Saeid', 2],
    ['Ishikawa, Tadashi & Saito, Masayuki U. & Kishimoto-Yamada, Keiko', 4],
    ['Krüger, Andreas & Deckert, Jürgen', 4],
    ['Kóbor, Péter', 6],
    ['Linnavuori, Rauno E.', 18],
    ['Norbiato, Margherita & Dioli, Paride & Cianferoni, Fabio', 1],
    ['Sakenin, H. & Samin, N. & Rastegari, J. & Havaskary, M.', 1],
    ['Stål, Carl', 1],
    ['Tang, Jin & Zhang, Gongaote & Guo, Junqi & Luo, Lingxuan', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1],
    ['Yazici, Gülten & Yildirim, Erol & Moulet, Pierre', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=70)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);