function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bukejs, Andris', 1],
    ['Jelínek, Josef & Hájek, Jiří', 20],
    ['Jelínek, Josef & Lasoń, Andrzej & Hájek, Jiří', 2],
    ['Lasoń, Andrzej', 1],
    ['Lasoń, Andrzej & Mazur, Miłosz A.', 1],
    ['Majka, Christopher & Webster, Reginald & Cline, Andrew', 5],
    ['Reed, Sharon E. & Dutkiewicz, David & Ross, Fiona', 1],
    ['Ruchin, Alexaner B. & Egorov, Leonid V. & Alekseev, Sergei K.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    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);