function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bueno-Villegas, Julián & Sierwald, Petra', 1],
    ['Duy – Jacquemin, Monique Nguyen & Uys, Charmaine', 2],
    ['Duy-Jacquemin, Monique Nguyen', 18],
    ['Duy-Jacquemin, Monique Nguyen & Azar, Dany', 4],
    ['Duy-Jacquemin, Monique Nguyen & Uys, Charmaine', 2],
    ['Golovatch, Sergei I. & Wesener, Thomas', 13],
    ['Huynh, Cuong', 19],
    ['Huynh, Cuong & Likhitrakarn, Natdanai', 6],
    ['Huynh, Cuong & Veenstra, Anneke A.', 3],
    ['Karasawa, Shigenori & Kawano, Keisuke & Fukaya, Shin-ichi', 5],
    ['Korobushkin, Daniil I. & Semenyuk, Irina I. & Tuf, Ivan H.', 2],
    ['Short, Megan & Huynh, Cuong', 12],
    ['Short, Megan & Vahtera, Varpu', 4],
    ['Short, Megan & Vahtera, Varpu & Wesener, Thomas', 5],
    ['Wesener, Thomas & Moritz, Leif', 2],
    ['Other (8)', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=106)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);