function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Antonietto, Lucas Silveira & Machado, Cláudia Pinto', 2],
    ['Brady, George Stewardson', 2],
    ['Guernet, Claude & Huyghe, Damien & Lartaud, Franck', 2],
    ['Hiruta, Shin-ichi', 2],
    ['Kempf, Eugen Karl', 1],
    ['Meisch, Claude & Smith, Robin J. & Martens, Koen', 2],
    ['Nakao, Yuriko & Tsukagoshi, Akira', 1],
    ['Okubo, Ichiro', 3],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Schornikov, Evgeny I.', 9],
    ['Tanaka, Hayato & Hayashi, Ryota', 3],
    ['Tanaka, Hayato & Yoo, Hyunsu & Pham, Huyen Thi Minh', 1],
    ['Yoo, Hyunsu & Thi, Van Anh Le & Karanovic, Ivana', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);