function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 1],
    ['Ballarin, Francesco & Yamasaki, Takeshi & Su, Yong-Chao', 1],
    ['Dupérré, Nadine & Tapia, Elicio', 5],
    ['Lopardo, Lara & Hormiga, Gustavo', 1],
    ['Miller, Jeremy & Griswold, Charles & Yin, Chang', 3],
    ['Miller, Jeremy A. & Griswold, Charles & Yin, Chang Min', 1],
    ['Suzuki, Yuya & Hiramatsu, Takehisa & Tatsuta, Haruki', 4],
    ['Zhao, Qingyuan & Li, Shuqiang', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);