function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bidzilya, Oleksiy', 1],
    ['Bidzilya, Oleksiy & Karsholt, Ole & Kravchenko, Vasiliy', 2],
    ['D, Nandhini & R, Shashank P. & Joshi, Rahul & Reddy, Karthik M.', 4],
    ['Karsholt, Ole & Huemer, Peter', 1],
    ['Li, Houhun & Wang, Zhibo & Sattler, Klaus', 3],
    ['Omelko, M. M. & Omelko, N. V.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);