function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bidzilya, Oleksiy & Karsholt, Ole & Kravchenko, Vasiliy', 1],
    ['D, Nandhini & R, Shashank P. & Joshi, Rahul & Reddy, Karthik M.', 11],
    ['Ga-Eun Lee 1 & Houhun Li & Taeman Han & Haechul Park', 52],
    ['Karsholt, Ole & Huemer, Peter', 1],
    ['Kyaw, Khine Mon Mon & Yagi, Sadahisa & Oku, Johei', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=72)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);