function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Das, Apurva & Pathania, Prakash C. & Singh, Navneet', 50],
    ['Oku, Johei & Sakamaki, Yositaka & Hirowatari, Toshiya', 8],
    ['Park, Kyu-Tek', 9],
    ['Park, Kyu-Tek & Cho, Soowon & Bae, Yang-Seop', 1],
    ['Park, Kyu-Tek & Heppner, John B. & Bae, Yang-Seop', 1],
    ['Park, Kyu-Tek & Kim, Sora', 2],
    ['Park, Kyu-Tek & Koo, Jun-Mo', 1],
    ['Park, Kyu-Tek & Koo, Jun-Mo & Jeong, Su-Yeon & Prins, Jurate De', 9],
    ['Park, Kyu-Tek & Koo, Jun-Mo & Minet, Joël', 1],
    ['Park, Kyu-Tek & Prins, Willy De', 11],
    ['Ponomarenko, M. G. & Chernikova, P. N.', 1],
    ['Yu, Shuai & Wang, Shuxia', 137]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=231)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);