function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akrami, Mohammad Ali', 1],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 3],
    ['Ermilov K, Sergey G. & Frolov K, Andrey V.', 2],
    ['Hushtan, Habriel H. & Hushtan, Kateryna V. & Glotov, Sergii V.', 1],
    ['Murvanidze, Maka & Mumladze, Levan', 2],
    ['Seniczak, Stanisław & Seniczak, Anna', 1],
    ['Weigmann, G. & Miko, L.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);