function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aiello, Dalia & Vitale, Alessandro & Polizzi, Giancarlo', 4],
    ['Gao, Hanxing & Yin, Jingyan & Li, Yu & Liu, Shuyan', 2],
    ['Lestari, Anis S. & Wanasinghe, Dhanushka N. & Gafforov, Yusufjon', 1],
    ['Pérez-Hernández, Cisteil Xinum', 2],
    ['Safi, Atena & Mehrabi-Koushki, Mehdi & Farokhinejad, Reza', 1],
    ['Thiyagaraja, Vinodhini & Wanasinghe, Dhanushka N.', 2],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);