function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Deng, Wei-An & Zheng, Zhe-Min & Li, Xiao-Dong & Lin, Min-Ping', 1],
    ['Deng, Weian & Zheng, Zhemin & Wei, Shizhen', 3],
    ['Hollier, John', 1],
    ['Muhammad, Amira Aqilah & Deranja, Maks & Adzic, Karmela', 1],
    ['Muhammad, Amira Aqilah & Tan, Ming Kai & Abdullah, Nurul Ashikin', 22],
    ['Storozhenko, S. Yu.', 3],
    ['Storozhenko, Sergey Yu. & Dawwrueng, Pattarawich', 2],
    ['Tan, Ming Kai & Abdul Wahab, Rodzay bin Haji', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    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);