function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Golovneva, Lina & Bugdaeva, Eugenia & Volynets, Elena', 2],
    ['Novikov, Andriy', 1],
    ['Sakala, Jakub & Selmeczi, Ildikó & Hably, Lilla', 1],
    ['Santamaria-Aguilar, Daniel & Lagomarsino, Laura P.', 12],
    ['Sukhorukov, Alexander P. & Nilova, Maya V. & Erst, Andrey S.', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);