function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Das, Apurva & Singh, Navneet', 23],
    ['Donner, Hans & Wilkinson, Christopher', 14],
    ['Hoare, Robert J. B. & Nieukerken, Erik J. van', 12],
    ['Huemer, Peter & Van Nieukerken, Erik J.', 8],
    ['Navickaitė, Asta & Diškus, Arūnas & Stonis, Jonas R.', 63],
    ['Rocienė, Agnė & Stonis, Jonas R.', 22],
    ['Stonis, Jonas R. & Diškus, Arūnas & Remeikis, Andrius', 249],
    ['Stonis, Jonas R. & Remeikis, Andrius', 12],
    ['Stonis, Jonas R. & Remeikis, Andrius & Davis, Donald R.', 11],
    ['Stonis, Jonas R. & Remeikis, Andrius & Diškus, Arūnas', 50],
    ['Stonis, Jonas R. & Rocienė, Agnė', 66],
    ['Yagi, Sadahisa & Hirano, Nagao & Hirowatari, Toshiya', 9],
    ['van Nieukerken, Erik & Laštůvka, Aleš & Laštůvka, Zdeněk', 61],
    ['van Nieukerken, Erik J. & Doorenweerd, Camiel & Nishida, Kenji', 16],
    ['van Nieukerken, Erik J. & Laštůvka, Aleš & Laštůvka, Zdenĕk', 149],
    ['Other (26)', 55]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=820)',
    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);