function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Belavadi, Vasuki V.', 3],
    ['Boustani, Mira & Rasmont, Pierre & Dathe, Holger H.', 3],
    ['Byvaltsev, A. M. & Belova, K. A. & Danilov, Yu. N.', 1],
    ['Güler, Y.', 1],
    ['Nalinrachatakan, Pakorn & Ascher, John S. & Kasparek, Max', 2],
    ['Nkulu, Alain Tshibungu & Pauly, Alain & Dorchin, Achik', 1],
    ['Risch, Stephan & Roberts, Stuart P. M. & Smit, Jan', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);