function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arefina, Tatyana I.', 1],
    ['Baturina, N. S. & Efstifeeva, S. S.', 2],
    ['Hoang, Duc Huy & Bae, Yeon Jae', 12],
    ['Ji-Hua, Xu & Bei-Xin, Wang & Chang-Hai, Sun', 16],
    ['Ji-Hua, Xu & Chang-Hai, Sun & Bei-Xin, Wang', 6],
    ['Malicky, H.', 13],
    ['Malicky, Hans', 3],
    ['Mey, Wolfram & Malicky, Hans', 14],
    ['Nozaki, Takao & Arefina, Tatyana I. & Hayashi, Yoshio', 1],
    ['Nozaki, Takao & Saito, Rie & Nishimura, Noboru & Tojo, Koji', 2],
    ['Oláh, János & Johanson, Kjell Arne', 1],
    ['Pandher, Manpreet S. & Saini, Malkiat S. & Parey, Sajad H.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=74)',
    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);